Dave Meltzer breaks down the thought process the UFC went through when seeking a replacement for Matt Serra:
St. Pierre and his management team called UFC after getting news of Serra’s injury, and asked for the match. At that point, UFC officials were looking at presenting either Josh Koscheck or Thiago Alves, with the latter having the better shot since he was coming off four straight wins. Jon Fitch, who may have been the first offered the fight, turned it down, because he had gained significant weight and felt he couldn’t make weight in a healthy fashion on short notice. His camp, San Jose’s American Kickboxing Academy, suggested Koscheck, who is closer to the 170-pound weight limit, would have made an interesting opponent for Hughes. The only negative was Koscheck was coming off a loss to St. Pierre on Aug. 26.
St. Pierre was thought off limits. He already had a guaranteed title shot in April, with his home city of Montreal close to locked up as the location. But with seven months between fights, St. Pierre was getting antsy for competition. He had even talked of competing in amateur wrestling at the Canadian national level. St. Pierre, with no competitive wrestling background, outwrestled Koscheck in his win.
So basically if it wasn’t for GSP stepping up and saying “I want this fight”, we could have ended up with a gigantic turd of a main event. So again, I just want to say “Thank you Georges for having the balls to do this!”