Chelsea's Nigerian midfielder Victor Moses (L) vies with West Ham United's Irish defender Joey O'Brien (R) during the English Premier League football match between West Ham United and Chelsea at the Boleyn Ground, Upton Park, in East London on December 1, 2012. AFP PHOTO / IAN KINGTON RESTRICTED TO EDITORIAL USE. No use with unauthorized audio, video, data, fixture lists, club/league logos or ?live? services. Online in-match use limited to 45 images, no video emulation. No use in betting, games or single club/league/player publications