Mikel Arteta is said to have misgivings over William Saliba's defending as the French youngster looks set to leave Arsenal on another loan deal.
Having been handed the No.4 shirt for the new campaign the teenager was expected to play a part in Arteta's plans.
However, the Gunners currently possess a healthy array of centre-backs at the club having signed Gabriel Magalhaes this summer, as well as adding Pablo Mari on a permanent deal.
All of which means that Saliba is set to be allowed to leave on loan, with a move back to Saint-Etienne collapsing before the closure of the French transfer deadline to the frustration of the Ligue 1 club and the player.
EFL sides are still allowed to sign players though, and the centre-back is now being tipped for a temporary move to the Championship with Brentford said to be at the head of the queue.
The Gunners boss will hope that a move sees the teenager iron out the flaws in his game, with defending set-pieces and a tendency to dive into tackles both seen by the Spaniard as areas of concern, according to ESPN.
Arteta will hope that those issues can be worked on during any loan deal, with Saliba still seen as an exciting prospect by the club.
This article was most recently revised and updated 2 years ago