Brentford have signed former Arsenal midfielder Josh Dasilva on a four-year deal with a one-year extension option.
The 19-year-old turned down a new Gunners contract, meaning the Premier League club will receive compensation.
The England Under 20s international, who joined Arsenal aged eight, featured three times for them in the League Cup in 2017.
Bees head coach Dean Smith said: "He is an excellent footballer with a great personality."
Find all the latest football transfers on our dedicated page.