Aston Villa's US defender Eric Lichaj (3rd R) heads the ball as Chelsea's Brazilian defender David Luiz (3rd L) raises his foot to challenge during the English Premier League football match between Chelsea and Aston Villa at Stamford Bridge in London, on December 23, 2012. (AFP PHOTO/CARL COURT) RESTRICTED TO EDITORIAL USE. No use with unauthorized audio, video, data, fixture lists, club/league logos or