In a statement on Tuesday, United said: "Victor is currently undergoing a series of precautionary investigations. He has recovered well from the episode he experienced in the match against Norwich.

"All indications are that this is not linked to any Covid outbreak within the club."

United's Premier League match away to Brentford, scheduled for Tuesday night, was postponed after a number of positive Covid-19 tests among players and staff led to the closure of their Carrington training complex on Monday.