Chelsea's Nigerian midfielder John Obi Mikel (2nd R) stumbles after being challenged by Manchester City's Spanish midfielder David Silva and English midfielder James Milner (2nd L) during the English Premier League football match between Manchester City and Chelsea at the Etihad Stadium in Manchester, northwest England, on February 24, 2013. AFP PHOTO/PAUL ELLIS 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.