Manchester City defender Micah Richards feels a hamstring injury may rule him out of the FA Cup semi-final clash with rivals Manchester United.
Richards was stretchered off three minutes into England Under-21s 4-0 victory over Denmark on Thursday night, and head coach Stuart Pearce revealed the full-back fears the worst.
"He's got a hamstring problem and he's diagnosed himself as being out for four weeks - that's Dr Richards for you," said Pearce
"That could be four days though, as that's him diagnosing himself!
"Let's hope for Manchester City's sake and the preparation in the summer (UEFA Under-21 Championship) that it's not too long."
City face crucial Barclays Premier League games at home to Sunderland and away at Liverpool on April 3 and April 11 respectively, before the highly-anticipated Wembley showdown with Sir Alex Ferguson's side at Wembley on April 16.