Ronaldo has scored just four La Liga goals, from over 90 shots this season as Real flounder in fourth place in La Liga.
With the January transfer window open, speculation has been rife over a possible exit for Ronaldo from the Spanish capital, with former club Manchester United a rumoured eventual destination.
Zidane said on Thursday that the Portugal captain was not being distracted by the talk around his future and would focus on helping the team out of their current hard spot.
"I am not imagining anything, I go from day to day, I always do this and my way of thinking will not change", he stated. I only talk to him about what goes on on the pitch.
Real are preparing for their Copa del Rey tie with Leganes.
7.3-magnitude quake strikes off Peru; no injuries reported
Electricity was out in several municipalities and many roads were closed or passable in only one direction, the mayor said. A 7.1-magnitude quake 124 kilometers southwest of the town of Puquio off the coast of Peru, according to the U.S.
Ronaldo has been left frustrated by Real president Florentino Perez who has stalled on offering him an improved contract. Cristiano is [too] old for all this.
Zidane has fielded sides made up of mainly fringe players in the last two rounds of the Cup, but it is fair to say the only players who impressed against Fuenlabrada and Numancia were striker Borja Mayoral and winger Lucas Vazquez.
Los Blancos are now in turmoil and sit a massive nineteen points off of rivals Barcelona, following the defeat at home to Villarreal.
His future is in need of resolving and plenty of clubs will be watching closely to see what develops in the coming months.
"Cristiano is a part of this club, where he belongs".