But speculation has mounted on the Portuguese icon future in Turin after Juventus latest exit from Europe's top competition last week.
And Ronaldo's former Madrid boss Zidane has admitted a stunning reunion between the pair could be on the cards.
Asked about the rumours, he told Sky Sports: “Yes, it may be.
“We know Cristiano, we know the person he is and everything he has done here.
“But now he’s a Juventus player and we must respect this.
“Now, let’s see what the future will be. I was lucky enough to coach him and he is very impressive. Right now, he’s helping Juventus.”
Italian reports suggested a fee of just £25m would be enough to seal the 36-year-old’s Bernabeu return.
However, despite claims the five-time Ballon d'Or winner could leave for free, Juventus CEO Fabio Paratici insisted he is the future of the Old Lady.
This article was most recently revised and updated 2 years ago