William Saliba sustains serious injury on loan at Saint-Etienne

The timeframe for recovery is yet to be revealed.
Given the character of the injury (a fractured metatarsal), he's likely set for a lengthy spell on the sidelines.
The 18-year-old had missed the first 6 weeks of the season through an abductor muscle injury.

The official statement released by Saint-Etienne reads: "William Saliba, victim of a blow against AS Monaco last Sunday (a 1-0 win), suffers a crack of the fifth metatarsal and will miss the clash against Oleksandriya in the Europa League."

The centre-back has been a mainstay of Claude Puel's team after recovering from a hamstring injury he picked up in the summer. Saliba has helped his team to secure three clean sheets in four appearances since returning to the squad.

Another setback is likely to put him on the sidelines for a lengthy period. The extent of the injury is yet to revealed.

The promising teenager joined Arsenal for £27m only to be immediately loaned back to the Ligue 1 side.

When asked about the reverse temporary move, Saliba said: "Well, it was important first of all because I wanted to prove myself for another year at Saint-Etienne, before I come to try and establish myself here at Arsenal.

"This is a big club, and when you come here, you need to be ready. So I'm going to try and have a great season with the club that developed me in order to be ready for Arsenal."