Sunderland boss Tony Mowbray has revealed Manchester United loanee Amad needs a rest.
The winger has been outstanding for the Championship side, playing 28 games and scoring eight goals in the league.
He did not play in their most recent game against Norwich, and will be absent when they play Sheffield United on Wednesday.
"I had a good chat with Amad yesterday and Wednesday might be too soon for him," said Mowbray.
"I am not sure, but he will definitely be available next weekend."
Speaking to Sunderland's media, Mowbray added, "I think 30 odd games from never having a run of three games on the bounce has proved his body has almost shut down.
"His hamstrings are really sore and tight. There is no tear and there is no damage. He is just in a place where we need to give him a break and check him out of the equation for a week at the most and then he will finish the season strong, I am sure."