Manchester United boss Erik ten Hag says the club will soon know more about the fitness of Luke Shaw.
The England international, who recently signed a new contract at United, could not complete their game against Brentford in the Premier League.
Shaw came off during the contest on Wednesday, which United won 1-0 through a Marcus Rashford goal.
"In this moment I can't give anything about it," Ten Hag explained to reporters post-game.
"We have to wait 24 hours to make the right diagnosis."