there is no other choice for United but to win and get full points. if they want to catch up with Arsenal. otherwise United has to stop thinking about the Champions League next season.
the big and best teams are in the top 4 now. although it's a little difficult to seize Arsenal's position because Arsenal and Chelsea still have a difference of 1 game.
against Leicester, United must win.
Next match Manchester United vs Leicester City and moment for United catch up close position standing with Arsenal behind 4 points right now, but Arsenal have benefit behind 1 match left than Manchester United. Still possibility for Manchester United finish on 4th standing place depending with 9 match left how keep consistent for Manchester United get all points. But both Arsenal and Manchester United against each other and have chance for both team finish on 4th standing place. I think not only with Manchester United and Arsenal but also still have Tottenham Hotspur as candidate finish on 4th standing place because 3 points and have looks easy match left.