Manchester United manager Ruben Amorim has confirmed that defender Leny Yoro picked up a foot injury against Arsenal in the Premier League.
The French wonderkid started the 1-1 draw versus the Gunners at Old Trafford, but he was substituted at the half-time interval.
Ayden Heaven replaced him for his Premier League debut and the teenager delivered a solid display against his former employers.
Speaking after the game, Amorim was posed with plenty of questions and one of those was focused on Yoro's surprise early substitution.
The Portuguese clarified that Yoro had an issue with his foot and he will be assessed ahead of the second leg of the Europa League last 16.
United played out a 1-1 draw against Sociedad on the road last week and they must beat the Spanish outfit to make the quarter-final.
With the club languishing 14th in the top flight, winning the Europa League is their only route to the Champions League next season.