Newcastle boss Kevin Keegan faces a new selection headache ahead of Tuesday night's Carling Cup second-round trip to Coventry.Striker Obafemi Martins suffered a groin injury during Saturday's 1-0 Premier League home win over Bolton and is likely to be sidelined for up to three weeks.

Michael Owen returned - and scored - as a substitute, but is still not fully fit, while Alan Smith was only included on the bench in case of emergencies.

Damien Duff limped off with a knee problem and must be a doubt, while Mark Viduka (Achilles) remains on the sidelines, and that could mean a return to action for Shola Ameobi following the collapse of his proposed move to Ipswich.

Newcastle (from): Given, Harper, Beye, N'Zogbia, Taylor, Coloccini, Enrique, Bassong, Edgar, Butt, Geremi, Milner, Duff, Guthrie, Jonas, Smith, Owen, Ameobi, Donaldson.

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