Cristiano Ronaldo has been linked with a sensational return to Real Madrid and Zinedine Zidane faced questions over the Juventus star's future on Friday.

It was reported this week that Ronaldo's agent, Jorge Mendes, had contacted Madrid over a potential switch back to the LaLiga champions.

Portugal captain Ronaldo is Madrid's all-time leading goalscorer after finding the back of the net a staggering 451 times in 438 matches before joining Juve on a four-year deal in July 2018.

Madrid boss Zidane could not escape the speculation at his latest media conference as talk over the possibility of the 36-year-old rejoining Los Blancos continues to rumble on.

"We all know what he means for the club, what he did for the club," he said.

"I coached Ronaldo, he's part of the club's history, his contribution was magnificent but right now he's a Juventus footballer and he's doing very well for the club and there's not much more I can add to all the things that have been said.

"He's a Juve footballer and I have to respect the club and the player."

Madrid host struggling Elche on Saturday knowing they have no margin for error in the title race, as they trail Atletico Madrid by eight points.

Zidane says relegation-threatened Elche must not be taken lightly.

"We know in the Spanish league there are no easy games really," said the former France playmaker. "You look at the league table and it doesn't tell the whole story.

"It's a club that are down near the bottom, but they are a very good side and have put in some very good performances this season in the league.

"Now with the new manager [Fran Escriba] things have changed. We expect a tough game and we know we've got to put in a great performance if we want to take all three points and that's our aim."