Gabriel Jesus had a hand in all four Arsenal goals as Leicester were beaten at the Emirates Stadium on Saturday.
The summer signing scored twice in the first half, and probably should have completed a hat-trick, before laying on goals for Granit Xhaka and Gabriel Martinelli after the break.
On his home debut following his move from Manchester City he chipped Arsenal in front in the 23rd minute and made it 2-0 with a poacher's close-range header in the 35th.
Leicester got a lifeline when William Saliba, also making his home debut, headed into his own net eight minutes after the break but almost immediately a mistake by Leicester keeper Danny Ward allowed Granit Xhaka to restore Arsenal's two-goal lead.
James Maddison again gave Leicester hope when his shot went through the legs of Arsenal keeper Aaron Ramsdale but the hosts responded quickly with Gabriel Martinelli finding the bottom corner from an assist by Jesus.
It was a vibrant performance by Mikel Arteta's Arsenal side who have six points from their opening two games.
