Arsenal made it three successive league wins for the first time since January when they eased past 10-man Hull City 4-1 with Alexis Sanchez scoring twice and missing a penalty.
Gunners' season has yet to fully ignite but they made light work of a Hull side who had Jake Livermore sent off for handball in the first half.
Sanchez deflected the ball home to put Arsenal ahead after 17 minutes but the Chilean then fluffed his lines as his penalty was saved by Eldin Jakupovic following Livermore's dismissal.
It was plain sailing from there on in, though, as Theo Walcott doubled the lead 10 minutes into the second half and, although the hosts pulled a goal back from the penalty spot through Robert Snodgrass, there was to be no late fightback.
Sanchez calmed any jitters in the Arsenal ranks when he rifled the ball high into the net and Granit Xhaka made it 4-1 with a bullet finish from distance in stoppage time, putting the London club second in the table on 10 points.
