Former UFC welterweight champion Georges St-Pierre remains on a hiatus, but the mixed martial arts superstar is not closing his door on a possible comeback.

St-Pierre, who announced in December that he will step away from fighting indefinitely because of personal issues, admitted in a recent interview with AXS TV that he lost the desire to compete.

And before considering making his return to the Octagon, where he became one of the biggest stars of the sport, St-Pierre insisted that he needs to find the "fire" again, the urge to compete again.

"After my comeback against Carlos Condit, it was a lot of fun. It was a great training camp. After that, not so good, and the last one, not good at all. I lost the motivation. I lost the fun of it," St-Pierre said. "I need to find the fire back. The feeling that I want is that 'need' to compete again."

Another factor that could prevent St-Pierre from returning is UFC's stance on drug testing, citing the recent case involving Chael Sonnen, who recently announced his retirement after testing positive for banned substances.

St-Pierre, who has a 25-2 UFC record, reiterated that UFC should implement Olympic-style drug testing, which should be administered by a third-party organization.

"Chael Sonnen is a great guy. I'm against what he did but I like the person, he's a funny guy. Unfortunately this news came and I was shocked," St-Pierre said. "They need to make it more like Olympic drug testing -- make an independent organization that doesn't have any affiliation with the money of the organization."

The 33-year-old Canadian, who has not lost in his last 12 fights since a knockout loss to Matt Serra in 2007, insisted that he wants the best for mixed martial arts and he strongly believes that using the Olympic-style drug testing will take the sport into another level.

"The only thing I wanted to do is to help the sport, to raise another level. If you want it to go worldwide then it's the next step to follow, like judo or any other sport. We're lagging behind and it's normal because it's a new sport and we're still trying to figure out how to make this thing [work]. But that, I believe, is the next step," St-Pierre said.

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