Arsenal returned to the top of the Premier League table thanks to Gabriel’s close-range finish against Chelsea at Stamford Bridge.
Gabriel pounced to steer the ball over the line in the 63rd minute after the hosts failed to deal with Bukayo Sako’s right-wing corner, giving Arsenal a deserved lead.
When the game was scoreless, they had the best chances, but Gabriel Martinelli curled a shot over the crossbar and Gabriel Jesus failed to hit the target with a diving header when unmarked.
Chelsea struggled to create clear-cut chances, and ex-Arsenal captain Pierre-Emerick Aubameyang was unable to make an impact, as the Blues remain winless in four Premier League games.
Arsenal dropped to second place on Saturday when 10-man Manchester City defeated Fulham 2-1 thanks to Erling Haaland’s winning penalty in the fifth minute of injury time, but this victory puts them two points ahead of Pep Guardiola’s side after 13 games.