There's fears at Manchester City that David Silva is out of the derby on Thursday against Manchester United.
The midfielder was forced off early in the FA Cup semifinal defeat to Arsenal.
Silva had to be replaced Raheem Sterling after just 23 minutes at Wembley.
The speed with which manager Pep Guardiola substituted Silva spoke volumes - with the 30-year-old looking in discomfort as he left the pitch.
City face United on Thursday at the Etihad in the rearranged derby that was originally scheduled for February.