It's been reported he has a "strain" and will miss his country's matches against Latvia and Iceland.
Paul Parry has already withdrawn from the Welsh squad becuase of family reasons and City have lost Warren Feeney to Swansea on loan so that means the only City player on senior duty is Joe Ledley who is with Wales as they prepare to face Germany and Slovakia.
City have three lads with Wales U21. Darcy Blake, Chris Gunter and Aaron Ramsey.