Arsenal are set to be without Mathieu Debuchy for two months after the defender damaged ankle ligaments against Manchester City, reports The Express.
The 29-year-old looked in severe pain after going down unchallenged against Manchester City on Saturday afternoon. After falling heavily, Debuchy was stretchered off and appeared to be given oxygen as he left.
The initial fear was that Debuchy had fractured his ankle; an injury that would surely have ruled him out until the new year at least. Initial scans have confirmed that there is no fracture, but the severe sprain appears to have damaged ankle ligaments.
Wenger confirmed he was concerned for his summer signing in the post-game press conference.
He told reporters: "Debuchy has a badly sprained ankle. How long will he be out? I don't know but it doesn't look good.
"People told me they need a bit more time to assess how long he will be out but it's a bad ankle sprain."
It will be a significant blow for Debuchy. The right-back had established himself in the Arsenal squad, replacing Bacary Sagna almost seamlessly following his £12 million move from Newcastle.
His injury leaves Wenger with no option but to play Calum Chambers at right-back despite the fact the 19-year-old is also the club's third choice centre-back. The Gunners boss also gave his backing to youngster Hector Bellerin.
Wenger continued: "We have Chambers - we bought him for that [defensive cover]. At the start to play centre-back or right-back.
"Debuchy would have been suspended in Dortmund and Chambers was planned to play instead of him, and we have Bellerin as well who can play there."