Stevens coached the Dutch playmaker while in charge of Hamburg.
“His qualities are unprecedented,” Stevens said. “I would love to work with him again. We have contacts with his agent. Every day I speak to Horst Heldt [Schalke’s general manager] on the phone about our plans.
“There are rumours circulating that Rafael would return to Germany. But I have not heard from his mouth. I have not spoken with him and we’ll have to see after Euro 2012 .
“He has a contract so we will have to pay a ransom. If Rafa really wants it, he is welcome.
“If that opportunity arises, and he looks forward to it, let him come.”
Stevens is also keen on signing Chelsea forward Salomon Kalou this summer. The forward is available on a free transfer as his contract with the Blues expires at the end of June.
“Kalou is a Bosman player this summer,” he said.
“It’s obvious; there are many other clubs keen on him. Liverpool for example. But I know for sure he wants to move away from England. This could be our chance!”
