Kasper Schmeichel is a doubt for Leicester City's trip to Old Trafford on Saturday.
The goalkeeper pulled out of training on Thursday with a muscle problem after previously being out of action due to concussion.
Boss Claudio Ranieri has revealed the Dane may now miss Saturday's lunchtime clash with Manchester United.
"Kasper Schmeichel is good. Today he made some training session, but he has a little pain to the muscle," said Ranieri.
"Tomorrow I will check. I don't know now which muscle it is. He said to me: 'I feel something here'. So I said to him" 'Go inside.