 Diouf scored six goals in six games, with a second-half brace in a 4–1 victory over 1.FC Köln on 18 March 2012.In total Diouf played 15 times for Hannover in 2011–12 scoring ten goals including both goals against Atlético Madrid in the quarter final of the Europa League, although Hannover lost 4–2 on aggregate.