Is there a possibility that Atleti don't keep him if they don't make CL. If that happens we have a problem.
Newcastle would bite or even Aston Villa type.
He is a good player and for any team who doesn't care about wages, 30-40mil isn't much for quality player like him.
Heck, he would be upgrade on current united too.
I'd say interested teams could be:
Newcastle, Aston Villa, PSG and United.
Just throwing names though. Not exactly sure what these teams need but I see them all having some agenda acquiring him.