Manchester United striker Louis Saha has been hit by a new knee injury.

The Sun says Saha will be out of action for at least three weeks after yet another knee injury.

The Manchester United striker pulled up in training yesterday and it was initially feared that the injury was much worse.

But United are hopeful it is just a twist and the French star does not need an operation.

Saha, 29, arrived at United with an injury in 2004 and has struggled to stay fit since.

He has been injury-free since mid-November and spoke recently about his problems being behind him.

Saha has played 110 games for United and scored 41 goals since his £13million move.