Manchester - Manchester City captain Vincent Kompany could miss the rest of the season, manager Manuel Pellegrini said on Friday.
Kompany failed to return for the second half after suffering a groin injury in the struggling champions' 4-2 derby loss to Manchester United at Old Trafford.
Now the Belgium centre-back will miss the Premier League match against West Ham at Eastlands on Sunday and there is no guarantee as to when he will return.