Howe is not aware of any agreement over the length of Tonali's absence and is assuming he will be available for Wednesday's Champions League match.
He told reporters: "As far as I’m aware, I’m expecting him to be available. I will plan like that until told differently. I can’t second guess what will happen. He has trained today and is available. “
"If that’s the case [that UEFA don’t want him involved], you know more than I do. I know very little. I’ve been preparing for the game. So I will wait to hear if anything concrete comes through."