Mateja Kezman was struck by a missile thrown during Chelsea’s 1-0 win over West Ham as crowd trouble again overshadowed a League Cup tie in England.

Police made a total of 11 arrests inside Chelsea’s Stamford Bridge home for a mixture of reasons including drugs, offensive weapons and public order offences.

This latest outbreak of crowd trouble took place just 24 hours after Liverpool fans fought with police during their tie with Millwall.

Kezman was struck by a missile thrown from the West Ham end after Chelsea were awarded a penalty in front of the visiting supporters.

The Serbian and Montenegran strikerleft the field for treatment with blood coming out of a wound just above his left eye.

Fighting then broke out after the final whistle between the police and West Ham supporters. Police officers donned riot helmets as the confrontations continued for several minutes after the match between the two London clubs had finished.

“It’s a shame because I thought there was good English banter in the crowd, the chants were good natured,” said West Ham manager Alan Pardew.

“There’s a big rivalry between the two clubs and that will always be there. It will only be one or two because I thought our fans were in great voice and gave us great support tonight and I’d like to thank them for that.”