Arsenal have sent Spanish midfielder Jon Toral on loan to Birmingham City for the 2015-16 season.
The Spaniard, 20, will spend a second consecutive year in the second tier after turning out for Brentford last term.
He made 37 appearances for the Bees, 10 of which were starts, and scored six goals.
Toral joined Arsenal from Barcelona with Hector Bellerin in 2011.