FC Barcelona secured this season's La Liga title in emphatic style with
Robert Lewandowski put Barcelona ahead after just 10 minutes, and Alejandro Balde doubled the lead with a far-post volley nine minutes later before Lewandowski's second of the match made it 3-0 in the 40th minute.
Jules Kounde nodded in Barca's fourth eight minutes into the second half after getting on the end of a Frenkie de Jong cross. Javi Puado pulled a goal back for Espanyol in the 73rd minute, and Joselu netted a second in injury time, but it was too late for Espanyol.
The result leaves Xavi Hernandez's side with 84 points from 34 matches: a 14-point lead over second-place Real Madrid and 16 points more than Atletico Madrid in third.