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Stoke City's English goalkeeper Jack Butland (L) saves an attempted shot by Chelsea's Brazilian-born Spanish striker Diego Costa during the English League Cup fourth round football match between Stoke City and Chelsea at the Britannia Stadium in Stoke-on-Trent, central England on October 27, 2015. 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 75 IMAGES, NO VIDEO EMULATION. NO USE IN BETTING, GAMES OR SINGLE CLUB/LEAGUE/PLAYER PUBLICATIONS. (Photo credit should read OLI SCARFF/AFP/Getty Images)

Stoke City's English goalkeeper Jack Butland (L) saves an attempted shot by Chelsea's Brazilian-born Spanish striker Diego Costa during the English League Cup fourth round football match between Stoke City and Chelsea at the Britannia Stadium in Stoke-on-Trent, central England on October 27, 2015.   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 75 IMAGES, NO VIDEO EMULATION. NO USE IN BETTING, GAMES OR SINGLE CLUB/LEAGUE/PLAYER PUBLICATIONS.        (Photo credit should read OLI SCARFF/AFP/Getty Images)