Chelsea's Brazilian defender David Luiz (R) vies with Queens Park Rangers' Cameroonian defender Stephane Mbia (L) during the English Premier League football match between Chelsea and Queens Park Rangers at Stamford Bridge in London, on January 2, 2013. AFP PHOTO/GLYN KIRK 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.