Manchester City can confirm that Micah Richards has had an operation on damaged cartilage in his right knee.
The injury is a recurrence of the one that prevented him from playing against Sheffield United and Derby County earlier this year.
The 20-year-old travelled to London with club physiotherapist Ally Beattie for surgery today, and he will be out for a matter of weeks.
Club doctor Mark Whitaker said, "The operation has been successful, and Micah will begin a rehabilitation programme at Carrington starting tomorrow. The medical team will monitor his progress over the coming days and weeks."
Fortunately, it doesn't sound too serious a problem (although it is a recurrence of an old injury), and hopefully Richards will not miss more than a couple of games.
On a brighter note, Michael Johnson came through another reserve game yesterday and I would hope he definitely comes into contention for Saturday's game against Wigan.