Schalke's Dutch midfielder Ibrahim Afellay (L) reacts on the floor as referee Jonas Eriksson (R) shows him the yellow card after he went down in the penalty box under a challenge from Arsenal's Italian goalkeeper Vito Mannone as Arsenal's German defender Per Mertesacker (C) gestures during a UEFA Champions League group B football match between Arsenal and Schalke 04 at the Emirates stadium in London on October 24, 2012. AFP PHOTO / IAN KINGTON