LONDON, ENGLAND - MARCH 15: Diego Costa of Chelsea heads in the opening goal during the Barclays Premier League match between Chelsea and Southampton at Stamford Bridge on March 15, 2015 in London, England. (Photo by Mike Hewitt/Getty Images)
LONDON, ENGLAND - MARCH 15: Diego Costa of Chelsea heads in the opening goal during the Barclays Premier League match between Chelsea and Southampton at Stamford Bridge on March 15, 2015 in London, England. (Photo by Mike Hewitt/Getty Images)