Per Mertesacker Receives Red Card vs. Chelsea: Latest Details and Reaction

Per Mertesacker left Arsenal at a huge disadvantage in Sunday's derby clash with Chelsea when he was shown a straight red card after 20 minutes for hauling down Blues striker Diego Costa.

Chelsea's frontman was found in space behind Mertesacker, who couldn't make contact with the ball when sliding to recover as the last man. Sky Sports Statto captured the defender's reaction to the inevitable red card: