Arsenal's 6-0 defeat at the hands of Chelsea wasn't just embarrassing for the Gunners themselves. It was also a day to forget for referee Andre Marriner, who mistakenly sent off the wrong player! Alex Oxlade-Chamberlain tipped an Eden Hazard shot away from goal with his arm, but Marriner believed Kieran Gibbs to be guilty and duly sent him packing - despite Oxlade-Chamberlain's repeated confessions.