LONDON, ENGLAND - JANUARY 24: Diego Costa of Chelsea scores the opening goal during the Barclays Premier League match between Arsenal and Chelsea at Emirates Stadium on January 24, 2016 in London, England. (Photo by Shaun Botterill/Getty Images)
LONDON, ENGLAND - JANUARY 24: Diego Costa of Chelsea scores the opening goal during the Barclays Premier League match between Arsenal and Chelsea at Emirates Stadium on January 24, 2016 in London, England. (Photo by Shaun Botterill/Getty Images)