Chelsea's current condition is on the rise after some of Potter's schemes were quite successful in the few matches they played but Arsenal is a high wall that must be difficult for Chelsea to pass now.
With the current conditions, this may not be the same as last season where Arsenal can easily beat  Chelsea with a striking score but  IMO in this match Arsenal are still strong and can get 3 points in this match.
As long as Arsenal can overcome the movement of Sterling on the wing then it will be easier for Arsenal.