Manchester United striker Anthony Martial was injured during training, Mirror reported.
"He [Martial] didn't feel right after training yesterday. He walked off. He's injured," said manager Ole Gunnar Solskjaer. "Hopefully it won't be too bad. I don't know how long it will be."
Manchester United won 5-0 in a home clash against Brugge. The first clash ended in a 1-1 draw.
Martial, 24, has scored 15 goals and made five assists in 31 Man United appearances.
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