Arsenal defender William Saliba is facing another spell on the sidelines.
The young defender, who joined the Gunners from Saint-Etienne for £27m in the summer transfer window, missed the beginning of the news season after undergoing surgery on a adductor muscle injury.
That kept him out for six weeks and didn't make his first appearance of the season until the end of September.
Since returning from injury, Saliba has been catching the eye of many Arsenal fans with his performances which have helped Saint-Etienne climb the Ligue 1 table.
Last weekend he came in for huge praise following a 1-0 win over AS Monaco - a game in which he managed to keep Wissam Ben Yedder rather quiet.
However, disaster struck for the teenager in that same game.
Speaking ahead of Saint-Etienne's Europa League fixture against FC Olexandriya on Thursday, manager Claude Puel confirmed that Saliba will miss the game through injury.
And it could be a bad one.
"William Saliba, victim of a blow against AS Monaco last Sunday (1-0), suffers a crack of the fifth metatarsal and will miss the confrontation against the FCO," a statement via the club's official website reads.

Saliba is spending the season on loan with the French outfit instead of being with the Gunners and explained his reasoning behind that decision when speaking to Arsenal.com following his arrival.
"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," he said.
"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."