The Gunners have 18 points from their opening seven games of the season with defending champions Manchester City one point behind and north London rivals Tottenham Hotspur also on 17 points.
As it happened: Brentford v Arsenal
Guillaume Saliba headed the visitors past in the 17th minute, rising to tip a corner from Bukayo Saka at the far post.
Another header 11 minutes later doubled Arsenal’s lead with Grant Xhaka picking out Gabriel Jesus with a perfectly floating cross from the left which the Brazilian met powerfully.
🔴 @Arsenal return to top of the table 🔴#BREARS https://t.co/gxaCQKJNxq
— Premier League (@premierleague) 1663505663000
The game was put past Brentford in the fourth minute after the break with a magnificent strike from outside the box by the Portuguese midfielder. Fabio Vierawho rocked the post.
Nwaneri, who is 15 years and 181 days old, came on as a substitute in the second minute of added time, the first player under 16 to feature in the competition.
Aged 15 years and 181 days, Ethan Nwaneri becomes the youngest player in #PL history! 🤩#BREARS | @Arsenal https://t.co/7gepwExUaD
— Premier League (@premierleague) 1663505955000
The loss leaves Brentford in ninth place with nine points.