Undisputed UFC Welterweight champion, Georges "Rush" St. Pierre, once again spoke about the possibility of getting inside the cage with Anderson Silva, and his decision-making process behind what would be the biggest fight in MMA history.

St. Pierre once again mentioned Anderson Silva's size advantage, but also stated that "The Spider" wants this superfight as his retirement bout. In contrast to GSP's comments, Anderson Silva recently stated that he would like to take an extended vacation from fighting. Silva wants to concentrate on his private life, with sights on a late 2013 return to the Octagon.

Such decision would give St. Pierre an opportunity to test his skills against Johny Hendricks, Nick Diaz, and other fighters in the extremely competitive UFC Welterweight division:

Quotes via CagePotato.com

"[Silva] wants to fight me so he can then retire. I would like to fight him too, but after I fight him and win the fight, what happens next? These days, yeah, there’s a lot of money to be made, but I don’t fight for the money. My motivation is to be the best. Like we said, to be the Wayne Gretzky of my sport. So if I fight him, what happens next? It will be over. I want the fight, but I want to take it when I decide the time is right, not when he wants the fight to happen. On top of that, he weighs 234 pounds; I weigh 188. So there’s a big weight difference.

I’ve fought guys who were bigger. I’m not scared of him, it’s just that I will take this fight when it makes sense for me. I just came back from an injury, there’s money to be made, there are fights in my weight class, other challenges out there, and if I fight him, I will have to gain weight, while he will have to lose weight, and then afterwards, I won’t be able to come back to my weight class."

Anderson Silva's manager, Ed Soares, recently related to another superfight available for his client - UFC Light Heavyweight champion Jon "Bones" Jones. According to Soares, Silva is much closer to Georges St. Pierre in terms of physical attributes than he is to Jon Jones. GSP has a different opinion, and that might be the most important factor behind his decision to decline, or at least to postpone the superfight with Silva.

To sum things up, St. Pierre made it crystal clear he's the one to decide whether this dream match-up will become a reality:

"First and foremost, I have things to do at 170 pounds. When I am ready and when I want the fight, that’s when it will happen."

GSP is currently 23-2 in his MMA career, with 7 consecutive UFC Welterweight title defenses.