Manchester United's Spanish midfielder Ander Herrera (L) and Chelsea's Brazilian-born Spanish striker Diego Costa (C) talk with referee Robert Madley (R) during the English Premier League football match between Manchester United and Chelsea at Old Trafford in Manchester, north west England, on April 16, 2017. / 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)