Arsenal made 10 changes for the visit of Brighton, with only William Saliba keeping his place from the win at Chelsea. Estonia international goalkeeper Karl Hein was handed his debut while there were rare starts for Marquinhos, Mohamed Elneny and Cedric Soares.
Brighton showed eight alterations from their win at Wolves as Danny Welbeck started against his former club and the likes of Levi Colwill and Tariq Lamptey also came in.
Despite a slow start, Arsenal broke the deadlock as Nketiah tucked away a fine finish. Brighton would have felt aggrieved at going behind but levelled from the penalty spot after Hein slipped over before jumping up and bursting off his line, bringing down Welbeck. The England international then dusted himself off to covert the resulting spot-kick and level matters.
Brighton turned things around at the Emirates Stadium just before the hour as Kaoru Mitoma, off the bench at the break, coolly finished past Hein.
The Seagulls added a third through Tariq Lamptey, the full-back surging forward and finishing well past a helpless Hein. A deserved win and Roberto De Zerbi’s third consecutive victory in all competitions.
Ben Hoggan was our man at the Emirates Stadium and here’s his player ratings...
9. Moises Caicedo 6/10
Came off at half time for Gross. A player who often attempts big challenges, and often gets them right, Caicedo had mixed results, picking up a yellow card and giving away a couple of dangerous free kicks. His class was evident at times though, especially when running with the ball through the middle of the pitch. 6/10 Photo: Clive Rose
10. Billy Gilmour - 8/10
In shoes that were very hard to fill, Gilmour showed class and comfort in the middle of the pitch. Often pressed aggressively, he dealt with it well and moved the ball on efficiently. A footballing metronome, he is another player who made a good case for a Premier League starting XI. 8/10 Photo: Clive Rose
11. Joel Veltman 6/10
A very quiet game but an error-free game for Veltman, who looked to be easing his way back into the fray. Similarly to Solly March, not much ball on the right side of the pitch, certainly in the first half at least. 6/10 Photo: Justin Setterfield
12. Mitoma 8/10
Came on after half time on the left, as Sarmiento moved to the right for March. Finished his goal fantastically well, as expected after his dynamism in recent months. Instantly made an impact as he came on, nearly assisting Danny Welbeck with a through ball. What a talent Albion have found. 8/10 Photo: GLYN KIRK