Manchester United forward Alejandro Garnacho left Old Trafford on crutches following his side's 0-0 draw with Southampton.
The 18-year-old has been a revelation for Erik ten Hag's side this season having been promoted from the club's academy.
But he could face a spell on the sideline after being taken off in injury-time despite entering the field in the 73rd minute against the Saints.
Garnacho was seen wearing a grey protective boot and using the aid of two crutches as he exited the stadium after his right ankle was caught by Kyle Walker-Peters’ challenge.