Manchester United striker Louis Saha is likely to be out of action until November or December, according to his agent.

Ranko Stojic said the France forward has undergone a knee operation in America in a bid to repair an injury which contributed to his disappointing season last term.

Stojic told the Manchester Evening News: "Louis has had surgery in America and he won't be on the field now for a few months.

"I don't know when he will be able to start training again but he is looking at being back around November or December. But it is going to be a while."

United have already been tipped to bring in reinforcements up front ahead of next year's Premier League title defence and Saha's long-term absence will hasten their search.

"There is no question that he will be changing clubs. He's been unlucky and it is very important now that he gets back to 100 per cent."  PA