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Chelsea's Brazilian-born Spanish striker Diego Costa (R) shoots but Stoke City's Bosnian goalkeeper Asmir Begovic (R) makes a save during the English Premier League football match between Stoke City and Chelsea at the Britannia Stadium in Stoke-on-Trent, central England, on December 22, 2014. Chelsea won the game 2-0. AFP PHOTO / OLI SCARFF 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 OLI SCARFF/AFP/Getty Images)

Chelsea's Brazilian-born Spanish striker Diego Costa (R) shoots but Stoke City's Bosnian goalkeeper Asmir Begovic (R) makes a save during the English Premier League football match between Stoke City and Chelsea at the Britannia Stadium in Stoke-on-Trent, central England, on December 22, 2014. Chelsea won the game 2-0. AFP PHOTO / OLI SCARFF

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 OLI SCARFF/AFP/Getty Images)