Goalkeeper Andre Onana will return to Manchester United to discover the extent of an injury sustained playing for Cameroon in a World Cup qualifier.
The goalkeeper has pulled out of Cameroon's squad for Tuesday's match against Libya.
Cameroon officials did not give details of the type or severity of the injury.
Onana, signed from Inter Milan for £47.2m in July, has played in all 18 of United's competitive fixtures so far this season.
United manager Erik ten Hag is already facing a number of injury issues as his squad prepare to return from the international break with a Premier League with a Premier League trip to Everton on 26 November and a Champions League visit to Galatasaray three days later.