Chelsea's Brazilian-born Spanish striker Diego Costa gestures during the English Premier League football match between West Ham United and Chelsea at the Boleyn Ground in Upton Park, East London on March 4, 2015. 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. (Photo credit should read GLYN KIRK/AFP via Getty Images)
