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WEST BROMWICH, ENGLAND - AUGUST 23: Pedro of Chelsea sets up the second Chelsea goal scored by Diego Costa of Chelsea during the Barclays Premier League match between West Bromwich Albion and Chelsea at The Hawthorns on August 23, 2015 in West Bromwich, England. (Photo by Michael Regan/Getty Images)

WEST BROMWICH, ENGLAND - AUGUST 23:  Pedro of Chelsea sets up the second Chelsea goal scored by Diego Costa of Chelsea during the Barclays Premier League match between West Bromwich Albion and Chelsea at The Hawthorns on August 23, 2015 in West Bromwich, England.  (Photo by Michael Regan/Getty Images)