Manchester United face the prospect of a two-week break from action on the back of a gut-wrenching 3-1 reverse to long-standing rivals Arsenal in a pulsating Premier League showdown.
Declan Rice came up with a stoppage-time strike for the Gunners before Gabriel Jesus added a late third to conclude what was a high-octane 90 minutes.
A quickfire exchange of goals from Marcus Rashford and Martin Odegaard had set the tone in the first half. Despite the result, there were encouraging signs for United in their performance, while Rasmus Hojlund impressed on his debut after being summoned from the bench.
However, the game was not without cost as Lisandro Martinez and Victor Lindelof pulled up with injuries. United have several concerns in that regard with Raphael Varane, Luke Shaw and Tyrell Malacia expected to be on the treatment table for several weeks.