Chelsea's Brazilian-born Spanish striker Diego Costa points to his black armband as he celebrates scoring his team's first goal during the English Premier League football match between Manchester City and Chelsea at the Etihad Stadium in Manchester, north west England, on December 3, 2016.  / AFP / Paul ELLIS / 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 PAUL ELLIS/AFP/Getty Images)