Aston Villa's US goalkeeper Brad Guzan lines up his wall during the English Premier League football match between Chelsea and Aston Villa at Stamford Bridge in London, on December 23, 2012. 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.