Diego Costa will be marked man after Arsenal antics, warns George Graham

Former Arsenal boss George Graham has warned Diego Costa he faces being targeted by officials after his indiscretions in Chelsea’s 2-0 win over the Gunners on Saturday.

Graham is adamant the Spain striker should have been sent off for bumping the chest of Laurent Koscielny and raising his hands to the Frenchman’s face in the first half at Stamford Bridge before Gunners defender Gabriel saw red for retaliation.