Real meet Barca today in the first-leg of the Super Cup at the Nou Camp.
With a packed squad to choose from following Madrid's triumph at the UEFA Super Cup, the Blancos boss is keeping his cards close to his chest, including the advent of Ronaldo's first start of the season.
"You'll see tomorrow," remarked Zidane "We are all well, physically and mentally perfect.
"Everyone wants to play and that's good, so I'll have to choose.
"Cristiano Ronaldo is ready. He's fine, he's had a vacation, and although he's only been with us a few days, he's worked hard on his fitness and he's ready."