Manchester United striker Wayne Rooney could miss Wednesday's Champions League last 16 second-leg clash with AC Milan at Old Trafford.
Sir Alex Ferguson's team lead 3-2 from last month's first leg at the San Siro but Rooney is a doubt for the return game after missing Saturday's 1-0 win at Wolves.
Rooney aggravated a knee injury during England's 3-1 friendly international victory against Egypt in midweek.
"He's a doubt for Wednesday, which is a bigger problem for us," said Ferguson. "It wasn't looking good when he got back on Thursday - his knee was swollen.
"I don't think he should have played on Wednesday. It's his own enthusiasm that has caused it. His problem is that he can't say no.
"He told us on Sunday he was feeling his knee. Then all of a sudden people put an arm around his shoulder with England and he wants to play.
"(England boss) Fabio Capello has to pick his best team. A win was important so I don't blame him at all. I was more disappointed with Wayne. Why didn't he come off? I can't believe it."