Chelsea's Brazilian-born Spanish striker Diego Costa wears a face mask as he warms up with Chelsea's Spanish defender Cesar Azpilicueta ahead of the English Premier League football match between Chelsea and Newcastle United at Stamford Bridge in London on February 13, 2016. / AFP / 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 75 images, no video emulation. No use in betting, games or single club/league/player publications. / (Photo credit should read BEN STANSALL/AFP/Getty Images)
