Arsenal and France Under-20 international William Saliba will join French side Marseille on loan for the upcoming season.
The centre-back, 20, signed for the Gunners from St Etienne in 2019 for a reported £27million but has yet to make his first-team debut.
He was loaned back to St Etienne for the 2019-20 campaign and spent the second half of last season with Nice.
Arsenal technical director Edu said the move would be good for Saliba's career.
He told the club's website: "Together with William, we have decided it will be good for his continued development to spend another season on loan.