TORONTO >> Welterweight champion Georges St-Pierre used his standup superiority to win his ninth straight fight, unanimously outpointing Jake Shields in UFC 129 on Saturday night.

St-Pierre, the 29-year-old mixed martial star from Montreal, improved to 22-2, receiving winning scores of 50-45, 48-47, 48-47 from the judges. He sustained an eye injury in the second round.

"I can’t see with my left eye right now. I can see a blur," he said

Shields, a 32-year-old California fighter, dropped to 26-5-1. He entered the fight with a 15-bout winning streak dating to 2005.

The fight was contested almost entirely on the feet, with St-Pierre offering an array of exotic kicks when not sticking out his jab or launching an overhand right. He wanted no part of Shields in the clinch, where the American could try to get it down to the ground to use his jiu-jitsu.

Both men were bloodied in the fourth and fifth rounds.

"His striking was much better than I thought," St-Pierre said. "He closed my eyes."

St-Pierre looked to the clock in the fifth as blood tricked off a cut on his nose.

In the co-main event before 55,000 fans — a record for a North American mixed martial arts card — at the Rogers Centre, featherweight champion Jose Aldo (19-1) unanimously outpointed Mark Hominick (20-9).

Aldo had winning scores of 48-45, 48-46, 49-46.

"He’s a hell of a fighter," Aldo said.

Former light-heavyweight champion Lyoto Machida knocked out 47-year-old Randy Couture with a devastating front kick, ending the UFC’s Hall of Famer’s farewell fight at 1:05 of the second round.

"This is it," Couture said.