Gabriel Jesus scored his first Arsenal goals since October as the Gunners restored their eight-point lead at the top of the Premier League with a comfortable win over Leeds.
Second-placed Manchester City's victory at home to Liverpool on Saturday lunchtime had cut the gap to five points, but Jesus's first-half penalty - awarded for Luke Ayling's mistimed challenge on the Brazilian - put Mikel Arteta's side in front just after the half-hour mark.
Leeds had created the better opportunities in the opening half hour of the contest, with Rasmus Kristensen, Crysencio Summerville and Jack Harrison all testing home keeper Aaron Ramsdale.