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Chelsea's Brazilian-born Spanish striker Diego Costa (R) comes together with Liverpool's Slovakian defender Martin Skrtel (L) during the English League Cup semi-final second leg football match between Chelsea and Liverpool at Stamford Bridge in London on January 27, 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/Getty Images)

Chelsea's Brazilian-born Spanish striker Diego Costa (R) comes together with Liverpool's Slovakian defender Martin Skrtel (L) during the English League Cup semi-final second leg football match between Chelsea and Liverpool at Stamford Bridge in London on January 27, 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/Getty Images)