Ole Gunnar Solskjaer accepted Eric Bailly's condition "doesn't look great" after the centre-back suffered a knee injury in Manchester United's win over Tottenham.
United clinched a 2-1 victory in Thursday's International Champions Cup clash thanks to Angel Gomes' well-taken effort in the 80th minute, but the main talking point from the contest was the blow to Bailly.
The Ivory Coast international had only been on the pitch for 10 minutes following his half-time introduction before going down in need of medical attention, having attempted to block a shot from Son Heung-min, who was flagged offside.