Manchester United midfielder Casemiro could miss their Europa League last 16 first leg match with Real Betis on Thursday.
United will face Real Betis at Old Trafford after beating Barcelona in the round of 32 last month.
They will be hoping to bounce back from their 7-0 humiliation at the hands of Liverpool in the Premier League on Sunday.
ESPN says Casemiro picked up an injury in the game against Liverpool.
It is suggested that the 31-year-old will be assessed by medical staff ahead of the game with his injury status unclear.