Viktor Gyokeres ended a barren goalscoring run from the penalty spot to send Arsenal back top of the Premier League with a hard fought 1-0 win at Everton.
The Gunners had been usurped at the top of the table by Manchester City earlier on Saturday, but restored their two-point advantage despite another unconvincing performance.
Mikel Artetas men needed a stoppage time winner to see off bottom-of-the-table Wolves last weekend and struggled to cut loose against a depleted Everton.