Manchester City defender Micah Richards is out of Sunday's FA Cup fourth-round tie at Sheffield United with a knee injury.Midfielder Javier Garrido is also sidelined through illness, but Emile Mpenza at least returns to strengthen the striking options after a five week lay-off with a hamstring problem.

With Nery Castillo recovering after a shoulder injury and Rolando Bianchi joining Lazio on loan this week, manager Sven-Goran Eriksson has added another striker to the squad in 18-year- old Daniel Sturridge.

Kick-off at Bramall Lane is at 4pm.

Man City (from): Hart, Ball Onuoha, Ireland, Geovanni, Mpenza, Elano, Vassell, Petrov, Corluka, Jihai, Samaras, Hamann, Dunne, Gelson, Etuhu, Sturridge, Isaksson.

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