A four-week lay-off would rule the England midfielder - a £55 million summer signing from Chelsea - out until September 19.
That could see him miss the visit of Brighton in United’s first game after the internationals and potentially the club’s first Champions League group game, as well as Saturday’s game against Nottingham Forest and the trip to Arsenal eight days later.
Ten Hag is hoping to sign another midfielder before the close of the transfer window on Friday week, with Fiorentina’s Sofyan Amrabat of interest while United have also been linked with Bayern Munich’s Ryan Gravenberch. But Mount’s injury could complicate any plans to sell McTominay, who has been out of favour under Ten Hag and facing an uncertain future.
I don't see us selling McTominay, he brings the kind of physicality none of our midfielders have + he is on low wages and he is a HomeGrown Club player, so he slots in nicely into both the PL and CL Squads.