Five different scorers struck for Arsenal as they beat 10-man Everton 5-2 at Goodison Park.
Everton took the lead on 12 minutes when Wayne Rooney curled past Petr Cech from outside the penalty area.
But Nacho Monreal levelled before half-time after Jordan Pickford parried Granit Xhaka's strike into his path.
Alexis Sanchez picked out Mesut Ozil to head Arsenal into a 53rd-minute lead, and then Everton's Idrissa Gueye was sent off for a second bookable offence.
Ozil teed up Alexandre Lacazette for Arsenal's third before Aaron Ramsey made it 4-1 on 90 minutes.
Oumar Niasse scored for Everton in stoppage time, before Sanchez completed the goal flurry.
Arsenal move to fifth with their first away win of 2017/18. Everton have slipped into the bottom three.
See: Everton report | Arsenal report