With second-place Real Madrid not in action after their game at Valencia was called off because of the devastating floods in the region, Hansi Flick's side stretched their lead on the champions.

Raphinha netted in between Olmo's goals as Barcelona racked up a three-goal lead by the 31st minute at the Olympic stadium.

Javi Puado pulled one back as Espanyol fought hard to avoid a derby pummeling in the second half, with the visitors scoring three disallowed goals.