He`s not wrong though, Zidane. Most people here rate Varane as a top 3 center back and a world class player, which is far from incorrect of course and yet there are two Varanes - the one playing next to Ramos and the one without Ramos. The one with Ramos is a solid, top player, but when Ramos is not on the field, Varane is nervous, erratic, not a leader and doesnt make an impression of a 100mil player. Games vs us in Madrid from last season and Ajax from this season comes to mind, then after quick check Real lost two more games this season with only Varane playing (without Sergio Ramos) - away to Leganes and away to CSKA Moscow, Leganes game was a return-leg in Copa Del Rey where Real have won 3:0 at home though, so not that important. If Ramos is to be axed then I can understand if Zidane doesnt see Varane as the pillar and the leader of his defense or at least have some doubts.
What I`m saying is that Varane is a good player, a good defender, but he`s more of a Bonucci than a Chiellini in my eyes. With that being said, I wouldnt turn him down, if there is a real chance to sign Varane, yeah, go for it. His game and his skills will improve even more in this Juventus, he`s awesome when he`s next to a solid, commanding center-back, our captain is like that and he isnt going anywhere.