The shot stopper was taken off with less than 10 minutes left in his team’s 3-0 win in World Cup qualifying on Friday after suffering with discomfort. After limping off the field, Fabrice Ondoa took his place.
The injury will come as a big concern to United manager Erik ten Hag given the Red Devils’ long list of fitness issues. Striker Rasmus Hojlund and Christian Eriksen both had to withdraw from international duty after sustaining injuries. Meanwhile defenders Jonny Evans, Lisandro Martinez and Tyrell Malacia are all out and midfielder Casemiro is missing until January.
The injury to Onana is not the only issue United to have cropped up on Friday, as Marcus Rashford was also forced off during England’s win against Malta. The forward collided with Three Lions team-mate Trent Alexander-Arnold at Wembley.
It is not yet known if Onana will feature for Cameroon when they meet Libya on Tuesday. Man Utd are back in Premier League action when they travel to Everton on Sunday, November 26.