#1 Taking Manchester United out of the race
What makes this game even more interesting is that Manchester United have to play Man City next, and they're likely to succumb to a defeat considering their recent form, and in case Arsenal get the win, they will be 5 points ahead of Man United, potentially ending the Red Devils' dreams of playing Champions League football next season.
On the other hand, Chelsea have tough away fixtures against the Manchester United and Leicester. The Foxes took all the three points home when they last played Chelsea, despite the game being played at Stamford Bridge.
Arsenal have a brilliant chance to solidify their position and Emery is likely to go with his best eleven. A win would totally change the ball game, with Arsenal having control of the 4th place with just three more league games to play.