This is the first time all of the combatant are from the same era, and they know each other pretty well. Because of that we can make a pretty safe assumption who will fight who.

Maul and Kenobi have a fairly big history. Maul killed Kenobi's master, Kenobi in turn chopped him in two. That duel haunted them both for over a decade. Maul hates Kenobi, he specifically plotted to exact revenge on him. Kenobi himself isn't disinterested in Maul either, he doesn't want to avenge his master, but he consideres Maul his responsibility. Furthermore he knows he has the best chance against him. Based on this I think they will find each other on the battlefield and duel it out.

You think you know me?! It was I who languished for years thinking of nothing but you. Nothing but this moment.

Dooku and Windu were a long time friends when Dooku was still part of the Jedi Order. Even after Dooku's departure they held each other in great respect. After the battle of Geonosis they became sort of a rivals. Most considered them each other's equals, and Mace also felt that the Clone Wars was his fault, because he didn't kill Dooku when he had the chance. After that he know he can't stop the war with a single death, Dooku's death, but he always thought that the capture or elimination of Dooku is a high priority.

Dooku being a very confident man wouldn't shy away to duel his old friend, his rival, and his equal. So I think it's a fair assessment that they too will want to fight each other.

Ah, Master Windu. Still so confident that one man can change the galaxy?

The leftovers are Shaak Ti and Savage. They never actually met. Shaak Ti's only knowledge is based on Kenobi's and Anakin's reports. Savage on the other hand can only know Ti if Maul told him about her. IF.

Depending on the flow of the battle they could either duel it out, or join one of the other 2 duels.

Well this is gona be hard to resist, but I'll try to make an argument that doesn't involve their previous encounters at the start.

Obi-Wan Kenobi is one of the most skilled lightsaber duelists of the entire mythos. He mastered several lightsaber forms. These include Shii-Cho, Soresu, Ataru, Shien, Niman and Jar'Kai. All of these give him something useful in combat. Shii-Cho allows him to fight outnumbered, and make his offense unpredictable. Soresu makes his defense nigh impenetrable. Ataru gives him a very solid offensive form that has a ridiculous synergy with Soresu. Shien allows him to be better at switching from defense to offense and vica versa. Niman allows him to successfully incorporate force attack into his lightsaber sequences.

His Soresu/Ataru pairing is highly effective. Soresu lacks offense, Ataru lacks defense. Perfect. Beyond that his unparalleled Soresu is so minimalistic and simple that it complements the taxing offense of Ataru. Throw in the mix his moving meditation and proficient force sense, and he is close to unbeatable in a pure lightsaber combat.

He pretty much has answer to anything, you can't really surprise him with anything. True to that statement he defeated various enemies that have nothing in common. He beat Darth Vader, a Djem So power duelist. Is Maul stronger than Kenobi? He might. Is that enough? No. He beat General Grievous, who could attack up to, and probably beyond, 20 strikes per second. Is Maul faster than Kenobi? He might. Is that enough? No.

"Not a master. The master," Mace had said. "Be who you are, and Grievous will never defeat you."

To complement his already impressive arsenal of lightsaber forms, he mastered other techniques that can help him in this encounter.

He is pretty much a master of Sokan. He can use and abuse the environment, which he did numerous times to great effect. He is also a proficient unarmed combatant. He even fought lightsaber wielding opponents with his bare hands. He also mastered Tae-Jitsu, incorporating physical strikes and kicks into his lightsaber sequence.

He was also a tactical genius, he proved this several times in large scale battles as well as in small scale duels.

“A fight is never a goal in itself. Sometimes it is simply a distraction from the true goal, and best countered with a larger distraction."

By numerous sources they are placed on the same level. This might be the most interesting, and closest duel in this tournament. Whoever gains the edge it will be by no means big.

Only Master Yoda and Mace Windu were considered to be on equal terms with him [Dooku.]

Among the other Jedi, perhaps only Mace Windu would have been his [Dooku's] equal on neutral ground.

In the following section I will prove why Mace Windu has the aforementioned slight edge.

Lightsaber combat

Dooku mastered a single lightsaber form. Makashi. But he did so to the highest degree, making him the best Form II user ever. He also knew the other forms enough to teach them to Jedi Padawans, and to identify them, and analyze their weaknesses.

Mace Windu mastered all seven lightsaber forms, but he didn't make the mistake of spreading himself too thin. He was the ultimate master of Form VII. He took Juyo, the hardest form and improved it. This is how Vaapad came to be. Vaapad is the perfected Juyo, but it's also more than that. Vaapad is not just a lightsaber form, it's a mentality, and a conduit (more on that later).

Only high-level masters of multiple forms can achieve and control the ultimate discipline known as Form VII.

"Six there were for generations of Jedi. The seventh is not well known. Powerful Form it is. Deadliest of all. But dangerous it is, for its master as well as its opponent. Few have studied. One student alone, to mastery has risen."

Vaapad comes with it's own move sets, which means Dooku has no way to analyze it and exploit

weaknesses. He will have to rely on his own skill of Makashi, which Windu also mastered.

So we have the best user of Form II and the best user of Form VII in this duel. They are also stated to be each others equal numerous times. So by the virtue of Form VII is stated to be "better" than Form II, I say Mace has the slight edge in terms of lightsaber combat.

Force abilities

Dooku was stated to be the most powerful Jedi behind Yoda, and that he became even stronger as a Sith Lord. On the other hand Mace also grew after Dooku left the order. Does this mean Dooku is more powerful in the force? Probably. Does this mean he can toy around with Windu? Hardly.

In ligthsaber combat Dooku mostly only used lightning and TK. Dooku is simply doesn't outclass Windu to the extent to ragdoll him. Best he can do is push him. But that cuts both ways, Windu is just as likely to force push Dooku, which his mastery over Niman would make it likely.

In regard to Force Lightning Windu can more than handle it. Worse case scenario he can block it with his lightsaber. Even a well before prime Kenobi was able to do this. Or better yet he can channel it away with Vaapad:

Lighting blasted the clouds above, and lightning blasted from Palpatine's hands, and Mace didn't have time to comprehend what Palpatine was talking about; he had time only to slip back into Vaapad and angle his blade to catch the forking arcs of pure, dazzling hatred that clawed toward him.

Because Vaapad is more than a fighting style. It is a state of mind: a channel for darkness.

Power passed into him and out again without touching him.

And the circuit completed itself: the lightning reflected back to its source.

Now let's see what Windu has up his sleeve that sets him apart from Dooku:

Shatterpoint. The ability to see fault lines in objects, people, events. Thanks to this ability Mace can exploit any weakness of Dooku and can manipulate the engagement to his own ends.

Vaapad. The other half of the deadly lightsaber form. This technique made Mace a conduit for the darkness. He could channel his own, as well as his opponents dark side energy:

Vaapad is a channel for darkness, and that darkness flowed both ways. He accepted the furious speed of the Sith Lord, drew the shadow's rage and power into his inmost center—

And let it fountain out again.

Vaapad made him an open channel, half of a superconducting loop completed by the shadow;

Based on these 2 rare powers yet again I think Mace gets the edge.

Shaak Ti is a legendary Jedi Master, who is just as deadly with the lightsaber as with the force. She mastered Makashi and Ataru. She was one of the best duelist of her era, which is an impressive accomplishment, considering that almost every form had it's best user in that era. Fisto, Dooku, Kenobi, Yoda, Anakin, and Windu were all the best of their respective forms. Not just in this era, but all eras. Being part of that elite speaks for itself.

Shaak Ti is a Master of Makashi and Ataru forms in addition to her legendary strength in the force.

Shaak Ti's lightsabre movements were fluid and graceful, making the most of her enhanced spatial awareness. Few escaped her deadly swirling blade.

He lacks entirely the flash, the pure bold elan of an Anakin Skywalker; there is nowhere in him the penumbral ferocity of a Mace Windu or a Depa Billaba nor the stylish grace of a Shaak Ti or a Dooku.

Her power in the force was also exceptional, only the best of the best could hope to defeat her.

Her force augmentation was such, that she could smash Magnaguards with a single kick, she ran faster than a train when she was exhausted, she was also faster and stronger than Darth Vader's secret apprentice Galen Marek.

Her endurance was also remarkable. She could survive a blaster shot to the chest, she shrugged of hits from Magnaguards electrostaff, that made other masters cry out in pain, and she survived a heavy beating from Grievous twice.

Her tutaminis was so profound, that she could catch lightsaber strikes and powerful force lightning, albeit temporarily. But not being outright overwhelmed by a lightning that was potent enough to one shot an AT-AT is impressive in itself.

Her offensive powers were strong enough to overwhelm even Galen Marek with TK and Kinetite.

Only the most skilled of the Order could stand against her!

You [Galen Marek] will need the full power of the dark side to defeat her. Do not disappoint me.

So what advantages and counters Shaak Ti has against opponents such as Savage? Well I start with lightsaber combat:

Makashi is the lightsaber to lightsaber form. It puts emphasis on footwork to outmaneuver opponents, fluidity, precision, and economy of motion. It is also an effective form to counter force users. Savage was only trained for a couple of months under Dooku and Maul, hardly enough time to master any form. He most likely relied on his physical prowess to overwhelm his opponents. Which won't happen here. We have seen the likes of Adi Gallia and unarmed Dooku dodging his blows with varying ease. Shaak Ti has experience with similar weapons in the form of Magnaguard's electrostaff. She also has her natural Togruta senses to help her avoid such strikes. If that won't happen she is capable of meeting power blows. She could block numerous Magnaguards with one hand each. She could also send Galen Marek flying with a single strike. I'm not saying she will shrug off Savage's blows, but it will hardly be her undoing.

On the other hand Savage's lack of skill against an accomplished Makashi master will be hard to overcome. The precision of the form will allow Ti to overcome Savage's rudimentary bladework or even disarm him by cutting his double bladed saber in half. Savage's physical strength will help him bridge the gap by some degree, but it won't be a trump card.

Makashi: "Ah -a technique that helps one resist the Force attacks of an enemy, and is also excellent for lightsaber combat. It does more damage, but it leaves you vulnerable to other attacks. Use it against others wielding the Force or lightsabers... but not against anyone else."

In terms of force powers I'd like to point out that Galen Marek, a fairly powerful force user, could barely use any power beside saving his own hide. Ti's deadly offense leaves little room for Savage to bring his powers to bear. Even if he manages to do so, Makashi's force resistance, Ti's tutaminis, and her endurance combined can overcome anything Savage throws at her (literally and figuratively).

In the history of the Jedi Order, only two opponents ever overcame him [Windu] in battle. One was Master Yoda, who some said was the Order's true master of lightsaber combat. The other was former Master Dooku, whose own fighting style was archaic, yet stunningly effective.

--Taken from Power of the Jedi Sourcebook

He was one of the most respected and powerful Jedi in the Order's twenty-five-thousand-year history, yet at the age of seventy Dooku's principles would no longer allow him to serve a Republic in which political power was for sale to the highest bidder.

--Taken from Revenge of the Sith novelisation

"Then best of all would be the strongest student, yes? Wisest? Most learned in the ways of the Force?" He nodded. "Best of all, Dooku would be!" His eyes found the other Jedi, one by one: and one by one, they looked away. "Our great student!" Yoda's ears flexed, then drooped. "Our great failure."

--Taken from Yoda: Dark Rendezvous

This is Dooku, Darth Tyranus, Count of Serenno:

Once a great Jedi master, now an even greater Lord of the Sith, Dooku is a dark colossus bestriding the galaxy.

--Taken from Revenge of the Sith novelisation

“Powerful you have become, the dark side I sense in you.”

--Yoda in Episode II: Attack of the Clones

Darth Maul is one of the most dangerous and highly trained Sith in the history of the Order.

--Taken from Star Wars: Character Encyclopaedia

One of the most skilled and deadly warriors in Sith history, Darth Sidious' apprentice took part in the first encounter between Jedi knight and Sith warrior for more than 1,000 years in the battle for Naboo.

--Taken from Star Wars - Fact Files #01

Form VII, also called Juyo, is the most difficult and demanding of all forms. Only high-level masters of multiple forms can achieve and control this discipline, which can lead to fantastic power and skill.

--Taken from Jedi vs Sith: The Essential Guide to the Force

The three combatants fought their way across the hangar floor, lightsabers flashing, bringing to bear every skill they had acquired over the years. The Jedi Knights tried continually to press the attack, and indeed, the Sith Lord was moving away from the Naboo and the starfighters and back toward the hangar's far wall. But Qui-Gon recognized that while it might seem as if the Jedi were driving him before them, it was the Sith Lord who was controlling the struggle. Wheeling and spinning, leaping and somersaulting with astonishing ease, their enemy was taking them with him, drawing them on to a place of his own choosing. His agility and dexterity allowed him to keep them both at bay, constantly attacking while at the same time effectively blunting their counterattacks, relentlessly searching for an opening in their defense.

Qui-Gon pressed hard in the beginning, sensing how dangerous this man was, wanting to put an end to the combat quickly. Long hair flying out behind him, he attacked with ferocity and determination. Obi-Wan came with him, following his lead. They had fought together before, and they knew each other's moves. Qui-Gon had trained Obi-Wan, and while the younger Jedi was not yet his equal, he believed that one day Obi-Wan would be better than he had ever been.

So they challenged the Sith Lord quickly, and just as quickly I discovered that their best efforts were not good enough to achieve an early resolution. They settled into a pattern then, working as a team against their enemy, waiting for an opening. But the Sith Lord was too smart to give them one, and so the battle had gone on.

--Taken from The Phantom Menance novelisation

Grievous, snarling fury, ramped up the intensity and velocity of his attacks - sixteen per second, eighteen - until finally, at twenty strikes per second, he overloaded Obi-Wan's defense.

--Taken from Revenge of the Sith

Let's start with Maul, who at the age of 10 was left stranded on Mustafar with nothing but his training and the clothes of his back, for 17 days, he slept only twice during this period. And that was just the beginning, for his final test:

However this was merely the first stage of his ordeal:

Maul not only survived this trial, but summoned the strength to attack and press his Master:

Do you really think cushy Temple life compares? Even their combined battlefield experience wouldn't give them comparable levels of stamina. Sidious trained his apprentice to physical perfection, he will not tire.

You may have forgotten me, but I will never forget you. You cannot imagine the depths I would go to stay alive, fuelled by my singular hatred for you.

-- Darth Maul in Revenge

"I believe Maul's rage was so powerful, and his knowledge of the dark side so great, he simply refuse to die..."

--Obi-Wan Kenobi in The Sith Hunters

…it’s attacks can eviscerate defences – even the blocks of a Form III master…

--Taken from The Jedi Path

The Dark Side was strong on Felucia, and Shaak Ti was a beacon in that Darkness.

--Taken from The Force Unleashed graphic novel

She had taken a world enjoying the normal flows between the light and the dark sides of the Force and twisted it out of balance. There was still darkness on Felucia, but it was stifled, frustrated, weakened. He strained to awaken it, to remind it of its proper place in the universe. The light side had held sway for far too long. It was time to redress the issue. Killing Shaak Ti would do that quite nicely.

--Taken from The Force Unleashed novel

Getting to her, however, was proving to be something of a problem. Although he had sensed her clearly from orbit as a deformation in the Force, much like a body of mass deformed the fabric of space-time, he hadn't anticipated the dense flows he would encounter on the surface. The entire jungle was alive with the Force, from the tiniest spore to the mightiest rancor, and the Felucians themselves were alive with it, too-so alive, in fact, that they tapped into the Force as naturally as humans breathed an oxygen-rich atmosphere. That made them dangerous to him, the Sith apprentice who had come to crush the regime Shaak Ti had nurtured on Felucia.

--Taken from The Force Unleashed novel

After winning a competition among his Nightbrothers, Savage Opress is transformed by Nightsisters magic into a terrifying opponent for the Jedi.

--Taken from Ultimate Star Wars

However, Dooku and Asajj Ventress discover that their creation has a will of his own, and that he has grown more powerful than either of them had anticipated – perhaps even more powerful than the combined forces of the Jedi and the Sith.

--Taken from The Must-See Conclusion to an Epic Three-Part Clone Wars Arc, StarWars.com

“You consider him a threat?”

“He is a threat to all of us, even the Jedi.”

--Count Dooku speaking with Grievous

The saberstaff is ideal for defeating multiple opponents as well as for defending against blaster fire. The broad energy barrier created by a whirling saberstaff is impenetrable when deployed by a skilled Sith Lord…

--Taken from The Rule of Two in Book of Sith