Manchester City striker Nery Castillo has been ruled out for up to six weeks after fracturing a bone on his shoulder.
Castillo, on loan from Ukrainian side Shakhtar Donetsk, suffered the setback in the FA Cup victory against West Ham in midweek.
Manager Sven Goran Eriksson said: “He does not need surgery on the injury but he will be away for between five and six weeks.
“He is very unlucky and he’s the player we need as well.”
City face the Hammers again on Sunday and apart from Castillo, Michael Johnson (abdominal strain) and Emile Mpenza (hamstring) are again ruled out through injury.
Provisional squad: Hart, Onuoha, Corluka, Dunne, Richards, Ball, Garrido, Ireland, Hamann, Fernandes, Petrov, Elano, Bianchi, Vassell, Samaras, Isaksson, Jihai, Etuhu.