Saha was substituted during the 3-2 FA Cup victory at Reading last night.
He told MUTV: “It’s not too bad. Just a calf cramp and a few kicks so I think it was better for me to come off.”
Saha added on the match this weekend against Liverpool: “It’s a big game again, very hard. We’ve been there before and we expect a good game. We are working hard to do this (stay in every competition). Against Middlesbrough it’s going to be very difficult, but we expect to go through again.”