1. Jon Jones
The current UFC Light-heavyweight Champion tops the list.
He holds a pro record of 19-1 and is 12-1 in the UFC, with his only defeat via DQ.
Jones has smashed Tito Ortiz's record of most light-heavyweight title defences and has beaten four former champions whilst at it.
His most recent fight against Alexander Gustafson was his toughest to date, however, the American showed the heart of a champion to pick up the unanimous decision victory.
He next meets Glover Teixera in defence of his title in 2014 and could further cement his position at the top.
2. Georges St. Pierre
Georges St. Pierre continued his dominance of the 170lbs division when easily brushing past Nick Diaz in March.
He could be the most well rounded fighter in the world and is currently riding a 11-fight win streak, beating opponents such as BJ Penn, Carlos Condit and Jake Shields.
He meets KO artist Johnny Hendrix at UFC 167 in November.
3. Jose Aldo
In Jose Aldo's last fight, he beat his opponent Chan Sung Jung after battling kidney stones, and managed to overcome a broken foot during the fight to finish his opponent via TKO.
Aldo has beaten a who's who at Featherweight including former Lightweight Champion Frankie Edgar and Lightweight title challenger Kenny Florian.
His vicious Muay Thai style is awesome and his leg kicks are infamous.As his weigh cut is becoming progressively harder, a move to 155lbs could come soon.
4. Anderson Silva
The man dubbed 'The Greatest Fighter of all time' by UFC President Dana White may not be champion any more, but he still is one of the best in the world.
He was TKO'd in round two by opponent Chris Weidman due to his hands-down style and suffered his first loss in the UFC.
Silva looks to gain his title back at UFC 168 where fans will see if the KO was a fluke or Weidman is the better of the two.
5. Renan Barao
This guy may be the most under rated fighter around.
Still only Interim Bantamweight champion due to Dominick Cruz's injury, he has defended it twice and finished both opponents.
His latest title defence against Eddie Wineland ended via a devastating spinning back kick.
He holds a 31-1 record which boasts victories over fighters like Uriah Faber, Michael McDonald and Brad Pickett.
The Brazilian certainly cannot wait until champion Cruz is back fit again where they will see who is the undisputed champion.
6. Demetrious Johnson
Once a title challenger to Dominick Cruz's 135lb title, 'Mighty Mouse' was overjoyed when the UFC announced they were creating a Flyweight division.
At 125lbs he is 4-0-1 and has defended his title twice already.
He is probably the quickest man under the Zuffa company and has beaten Joseph Benavidez, a challenger to the old WEC Bantamweight title when Cruz was champion and Ian McCall who was dubbed the best Flyweight on the planet before the UFC made their 125lbs division.
Johnson and Benavidez meet again on November 30th at the Ultimate Fighter Finale.
7. Chris Weidman
You could say that Weidman should be ahead of Anderson Silva in the rankings. He is the one who dethroned him and holds the UFC Middleweight title. Weidman holds a perfect 10-0 record including wins over Demian Maia and Mark Munoz.
Weidman is keen to prove the KO of Anderson Silva was no fluke and gets his chance at UFC 168.
8. Anthony Pettis
Pettis came into the UFC as WEC champion, however lost his first fight against Clay Guida.
This showed him how different the UFC was and how he needed to step up his game. Since then he's gone 4-0 and captured the UFC 155lbs title.
'Showtime' has showed great maturity and is capable of finishing fights both on the feet and on the ground. His latest arm-bar win against Benson Henderson to get the strap was his most impressive to date.
9. Cain Velasquez
The UFC Heavyweight champion has really impressed since losing his title against Junior Dos Santos in November 2011.
He walked through Antonio Silva and then avenged the only defeat of his career by beating Dos Santos for five rounds on the feet and on the mat.
The rubber match between the two takes place on October 19th which could be an absolute cracker.
10. Benson Henderson
Henderson lost his title to Pettis, but he still is one of the best.
He defended the UFC 155lbs title three times, beating top opponents including Frankie Edgar, former Strikeforce Lightweight Champion Gilbert Melendez and embarrassed Nate Diaz for twenty five minutes.
He'll be back better than ever and could even move up to Welterweight for a run at GSP's title.
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