Even though in this case they don't have anything because the title is already in hand but it seems they are still eager to bring victory into their hands which of course this is a very good thing for Barcelona in this match.
Lewandowski scored another goal, which of course was very good to secure the top score.
With four more games remaining, Espanyol's loss against Barcelona was their 17th defeat overall in the Laliga competition, raising doubts over whether they will remain in the Laliga league next season. They are now in the 19th rank with 34 points as of today's loss against Barcelona.
Therefore, Espanyol needed a win very much, as well as Barcelona in general.
Barcelona's class was much higher and they won!
Xavi was able to win La Liga at the first attempt and will probably stay on as coach next season.