Van Nistelrooy is expected to leave Real Madrid in January after falling out of favour at the Bernabeu.
Rush said: “Sometimes Torres needs a break, and if Rafa has only one wish in the transfer window, I hope it’s a top-class striker.
“I would love to see him bring in someone like Van Nistelrooy, a proven goalscorer with experience at the highest level.
“World-class predators like him don’t become available every day of the week, and it doesn’t bother me where he’s played before – all it would take is a couple of goals and the supporters would take to him in a flash.”
