Georges St-Pierre has said that he's still unsure if he'll ever return to the UFC, despite rumours of a 2015 return.

The Canadian welterweight star has been on hiatus from the UFC since he beat Johny Hendricks at UFC 167 last year but it's always been a question of when, not if hell return.

Doping Issues

Speaking to TVASports, St-Pierre has said that he's still holding out for Olympic style drug testing before he commits to a return:

"My return depends on several variables that I do not control all. I think the issue of anti-doping tests grew a little, but it is not yet at the level where I want it to be. I want a program like the Olympics."

"Some people do not want to admit it, but there is a very serious problem of doping in our sport. This is for the safety of combatants and ethics that I want that."

He also admitted that it would a condition in his contract for his opponent to undergo the same testing as him.

There is also the issue of his knees. He tore a ligament in his left knee a couple months ago and has to have up to six months rehabilitation. It was the same injury that he suffered to his left leg back in 2011 that saw him out of competition for nearly two years.

No Drive

For St-Pierre though, the biggest issue is lack of drive and determination to get back into the Octagon:

"Before my hiatus, I lost the taste for competition. I went to training because I had to, not because I wanted to. Now, I feel good because I'm not the one everyone looks. I pass under the radar. I feel free."

"I do not feel I have something to prove. If I come back, it's because I want to. After so many years of competition, expectations, stress and criticism, sometimes you lose the flame."

Hollywood Commitments

At the moment St-Pierre is still crafting out a potential movie career, having starred in Captain America 2 and the upcoming Kickboxer remake, with wrestler, Dave Batista.

His return would be much heralded and it's likely he would get a title shot upon his return - whether that be in the welterweight division or not.

He noted in his interview that he's put on around 10lbs and for St-Pierre it's possible he's bulking up before committing to a return.

He's always been one of the lighter welterweights in the division in comparison to current champ, Johny Hendricks and the likes of Carlos Condit and Tyron Woodley, who are all 200lb+ when not in training.

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