Arsenal's Ethan Nwaneri became the youngest ever Premier League player at 15 years and 181 days as the Gunners defeated Brentford to return to the top of the table.
William Saliba set Arsenal on their way to a sixth win in seven top-flight games this season after the France defender climbed high to head Bukayo Saka's corner in off the post.
It was 2-0 inside the opening half an hour as Brazil forward Jesus, a £45m signing from Manchester City in July, headed Granit Xhaka's measured chip past David Raya.
Portuguese midfielder Fabio Vieira capped a dominant Arsenal display by marking his first Premier League start since joining from Porto with a goal from 25 yards.