Manchester United winger Alejandro Garnacho will be sidelined for several weeks after suffering an injury in the 0-0 draw with Southampton on Sunday.
The 18-year-old came on after 73 minutes of the game and appeared to be in pain after a challenge by Kyle Walker-Peters.
Garnacho then went off and was replaced by Fred in the closing stages before leaving Old Trafford on crutches.
"It is difficult to put into words how I'm feeling right now," said Garnacho.
"Unfortunately I will not be able to help my team and team-mates in the upcoming games in what is a very important part of the season for us at Manchester United.