Danny Welbeck's hopes of playing in Euro 2016 have been plunged into doubt after Arsene Wenger said he had been led to believe the England striker suffered a meniscus injury against Manchester City.
Welbeck received treatment for a knee problem sustained in the first half in a challenge with Bacary Sagna during Arsenal's 2-2 draw at the Etihad Stadium on Sunday.
He attempted to carry on but quickly made his way off the field and limped down the tunnel.
Welbeck now faces a scan on Monday but Wenger revealed the initial signs do not look good.
Wenger told Sky Sports: "Medical told me it could be a meniscus, lateral meniscus. I hope they are wrong. Danny looks down so he knows.
"I tried to keep him on the pitch. Straight away he moved out [of the pitch], he's not a guy who likes to move out. I'm a bit worried."
Asked if Welbeck will miss the Euros, Wenger replied: "I don't want to say that because that's too hard. Let's be a bit more optimistic and wait for the scan tomorrow."
If the injury is confirmed it would represent another huge blow to Welbeck, who spent nine months on the sidelines with a knee injury before returning in February.
