Manchester United fear new signing Leny Yoro could be sidelined for some time due to the ankle injury he sustained in the friendly against Arsenal, a source has told ESPN.
Yoro was forced off in the first half of the 2-1 defeat to Arsenal at SoFi Stadium in Los Angeles on Saturday in just his second start since his move from Lille.
The 18-year-old has been unable to train since and was pictured on Tuesday on crutches and wearing a protective boot on his left foot.
A source told ESPN that the club's medical staff are still assessing the injury.
United have declined to comment and manager Erik ten Hag is due to address the situation at a news conference on Thursday.
Yoro will miss the friendly against Real Betis in San Diego on Wednesday.
The loss of Yoro, who signed for £52 million ($67 million), is a blow to Ten Hag, who had hoped the Frenchman would replace Raphael Varane in defence.
Varane has joined Italian club Como after leaving Old Trafford on a free transfer at the end of last season.
Sources have told ESPN that United are still in the market for another centre-back and are maintaining interest in Bayern Munich's Matthijs de Ligt and Everton's Jarrad Branthwaite.
Bayern want £42m for De Ligt, while Everton have been quoted at more than £70m for Branthwaite.
United have already made two formal offers for Branthwaite, both of which have been rejected by Everton.
United also have fitness concerns over striker Rasmus Højlund, who was substituted in the first half against Arsenal after suffering a suspected hamstring injury.
