Real Madrid coach Carlo Ancelotti is wary facing Roberto de Zerbi's Shakhtar Donetsk in tomorrow's Champions League clash.

Ancelotti is a fan of fellow Italian De Zerbi.

“I know De Zerbi very well and he's a good friend," Ancelotti said during his pre-match press conference.

“He did really well at Sassuolo and his sides have a strong identity: they play really good football.

“The fact that we haven't played with a strong identity is because something has happened in the games," Ancelotti continued.

“At times, such as in the Espanyol game, I tried to defend with a 4-4-2 formation, but I'm now clear about the fact that this team has to set up in a 4-3-3 formation. There will be some games in which we go with a 4-3-3 without any real wingers, but this squad is more used to playing in a 4-3-3 formation and it's the ideal set-up for these players".