Largest second-leg comeback in a Champions League knockout tie

On 8 March 2017, FC Barcelona (Spain) overcame a first-leg deficit of 4–0 in their second-round tie against Paris Saint-Germain (France) at the Camp Nou in Barcelona, Spain, winning 6–1 to go through 6–5 on aggregate. The Catalan side scored three goals in the final seven minutes, with Neymar netting twice before substitute Sergi Roberto scored the decisive goal in the 94th minute. The previous largest comeback in a Champions League knockout tie was achieved by Deportivo La Coruña (Spain), who recovered from a 4–1 first-leg defeat to AC Milan (Italy) to win the return leg 4–0 in 2004.