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Watford's Nigerian striker Odion Ighalo (2L) stands between Chelsea's Brazilian-born Spanish striker Diego Costa (2R) and Watford's Ecuadorian defender Juan Carlos Paredes (L) during a sequence of incidents that saw both Costa and Paredes booked during the English Premier League football match between Watford and Chelsea at Vicarage Road Stadium in Watford, north of London on February 3, 2016. / AFP / ADRIAN DENNIS / 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 ADRIAN DENNIS/AFP via Getty Images)

Watford's Nigerian striker Odion Ighalo (2L) stands between Chelsea's Brazilian-born Spanish striker Diego Costa (2R) and Watford's Ecuadorian defender Juan Carlos Paredes (L) during a sequence of incidents that saw both Costa and Paredes booked during the English Premier League football match between Watford and Chelsea at Vicarage Road Stadium in Watford, north of London on February 3, 2016. / AFP / ADRIAN DENNIS / 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 ADRIAN DENNIS/AFP via Getty Images)