Arsenal moved above Tottenham and into the Premier League’s top four thanks to a stoppage-time penalty winner at Burnley on Sunday.
Alexis Sanchez converted in the 92nd minute after James Tarkowski had fouled Aaron Ramsey in the box to give the Gunners a 1-0 victory.
They climb to fourth, a point ahead of their North London rivals.
Meanwhile, Everton’s crisis deepened as they were thrashed 4-1 at Southampton, a side who had only scored nine league goals prior to the game.
Still without a manager a month after sacking Ronald Koeman, the Toffees have now conceded 28 goals in 13 league games this season – their worst effort since 1958/59.
Their latest loss began when Dusan Tadic poked the ball beyond Jordan Pickford but they were given hope on the stroke of half time when Gylfi Sigurdsson’s terrific 25-yard strike went in via post and bar.
However, defensive woes quickly returned with Charlie Austin nodding in twice in the first 15 minutes of the second half.
He could have easily had a hat-trick but it was left to Steven Davis to fire in the fourth late on.