Arsenal squandered the chance to go top of the table after they slipped to a 2-1 defeat to Everton at Goodison Park on Tuesday.
- Everton 2 Arsenal 1
- Sanchez opens scoring with free-kick
- Coleman equalises just before HT
- Williams heads Toffees in front
- Gunners' 14-match unbeaten run ends
In a first half that saw just one attempt on target from each team, Alex Sanchez gave the Gunners the lead from a deflected free-kick on 20 minutes, before Seamus Coleman restored parity with a header in the 44th minute.
Ronald Koeman's side put in a much-improved performance after the break and their efforts were rewarded on 86 minutes when Ashley Williams headed home the winner from a corner to end a 14-game unbeaten run for the capital club.
The visitors almost got off to a flying start when Sanchez won the ball inside his own half in the opening minute and surged down the right flank before searching out Mesut Ozil, but Maarten Stekelenburg intercepted the pass.
But for all their pretty passing and possession, Arsene Wenger's men did very little with the ball until the 20th minute when a sustained spell of pressure led to the opener.
Ross Barkley lost possession just outside his own area and Francis Coquelin went down under a challenge from Phil Jagielka to concede a free-kick in a dangerous position.
And Sanchez made then pay as he hit a low shot that took a big deflection off Ashley Williams to wrong-foot Stekelenburg and go in off the keeper's glove.
That was the north Londoners' only shot on target in the first half and they tailed off after taking the lead.
The Merseysiders went in search of the equaliser and Enner Valencia headed well over at the near post from Barkley's corner in the 29th minute, before Aaron Lennon fired over from a narrow angle on the left two minutes later following a mazy run into the box.
Romelu Lukaku lashed an effort over from just outside the area on 35 minutes and Lennon rushed his shot the wrong side of the right post after the Gunners failed to clear their lines in the 39th minute.
But the Toffees got the goal they deserved in the final minute of the half as Coleman steered a right-cross from Leighton Baines inside the right post from six yards out.
Ozil should have restored the Gunners lead nine minutes into the second half when he was picked out by Sanchez's cut-back pass from the byline on the left, but the German blazed over from just inside the box.
Barkley had Petr Cech worried for the first time on the hour mark as the midfielder latched onto Lukaku's downward header and drilled a low shot inches wide of the right post.
Alex Iwobi nearly made an impact off the bench when he controlled Sanchez's cross from the left to volley wide at the near post on 76 minute.
An exciting close to the match saw Jagielka's snapshot turned behind by Cech from a Barkley corner before Williams guided a free header in at the back post from the resulting set-piece.
Cech did just enough to keep out Barkley's low shot from the right at the death before Jagielka was sent off for a tug on Lucas Perez, having received his second yellow card.
More drama was to follow moments later as the Gunners were denied a penalty when Sanchez clashed with Kevin Mirallas after Nacho Monreal and Iwobi saw their respective shots blocked in stoppage time.