Harry continues his recovery from an ankle injury while Mauricio reported that Mousa twisted his ankle in Monday night's win against Watford.
Speaking at his press conference on Friday about Mousa's availability for West Brom, Mauricio said: "We need to assess him today. It's not clear whether or not he will be fit.
"We need to wait until after training and see if he's in condition to be part of the squad. It's not a big issue but it's so close from Monday's game. For sure, he'll be available for Wednesday (Newcastle at home, 9 May) and next weekend (Leicester home, 13 May)."