I'm sure Arsenal will win in this match, Chelsea is a bad team and can't compete against top teams.

Chelsea previous matches: they beat Brighton which currently in bad performance too, Fulham and Burnley (two mediocre teams).

Arsenal previous matches: they beat Manchester City aka toughest team, unlucky lose against Lens (but Chelsea is worse than Lens).

So it's obvious Arsenal will win, the odds is high too, don't miss to bet Arsenal to win @2.15.