Chelsea's Ivorian striker Didier Drogba receives treatment after a clash of heads during the English Premier League football match between Aston Villa and Chelsea at Villa Park in Birmingham, central England on February 7, 2015. AFP PHOTO / BEN STANSALL 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. (Photo credit should read BEN STANSALL/AFP via Getty Images)
