Manchester City manager Roberto Mancini expects Roque Santa Cruz to be sidelined for a month with his latest calf injury.

The Paraguayan lasted just four minutes of his comeback at Everton on Saturday before going down with the same problem that caused him to miss three games over the Christmas period.

Although Mancini does not believe Santa Cruz will need an operation, the City chief did confirm the £18million summer arrival from Blackburn will be out of action for a month.