Striker Alexandre Lacazette scored 21 seconds after coming on as a second-half substitute to give Arsenal a narrow win at Brighton.

The Frenchman swept in Bukayo Saka's ball for his third goal in three games to earn the Gunners their first back-to-back league wins since the start of the season.

However, their display lacked the fizz that saw them defeat Chelsea 3-1 on Saturday. They were particularly sluggish in the first half when they only managed one effort on goal.

The tempo and urgency was turned up a couple of notches after the break, with Pierre-Emerick Aubameyang and Gabriel Martinelli going close before Lacazette struck.

Brighton boss Graham Potter left forwards Neal Maupay and Danny Welbeck on the bench - two of six changes made to the starting XI. His side once again looked comfortable and composed on the ball but it was the same old story in attack.

The closest the home side came to scoring was when Alireza Jahanbakhsh forced a sharp save from Bernd Leno at his near post.

Arsenal climb up to 13th and now have 20 points, while Brighton remain two points above the drop zone in 17th.