John McEnroe (leg) helped off court

TORONTO -- John McEnroe had to be helped off the court with a hamstring injury during a Rogers Legends Cup match against Michael Chang.

The seven-time Grand Slam champion was stretching for a shot late in the second set Saturday when he collapsed to the ground, his face twisted in pain.

Chang and two medical officials tended to the 52-year-old McEnroe as he lay on the court for nearly 10 minutes. They finally hoisted him to his feet and he hobbled off the court, his arms wrapped around the two medics.

He stopped at one point to toss his white hat into the crowd, the effort causing him more discomfort.

This is the first year for the legends event as part of the Rogers Cup.

McEnroe was scheduled to play Andre Agassi on Sunday to cap the event. Four-time Grand Slam champion Jim Courier will play in his place.