Joel Campbell will return to Real Betis on a season-long loan deal from Arsenal.
The Costa Rican also spent the 2012/13 season with the Spanish side.
Arsenal 14/1 to win Premier League
The loan move is Campbell's sixth in his time with Arsenal, having spent the 2016/17 season with Portuguese side Sporting Lisbon.
In total, the forward has made 40 first-team appearances for the Gunners, with four goals scored in that time.
The 25-year-old is also still recovering from a knee injury picked up during this summer's Gold Cup, with his expected return date placed in late September or early October.