Football is not an exact science, but it is about chemistry: Ronaldo and Mandzukic, when they are together, have an excellent understanding.

I have worked with some of the most important players, like Ronaldo, Ibrahimovic, Kaka, Zidane, but the best are easy to work with because they are so professional. Their winning mentality, professionalism, helps the manager. Of course, sometimes I become angry, but usually my relationship with the players is calm.

With Ronaldo, I think I've identified a few patterns; there are certain striking things. I will try to utilise this knowledge to my advantage.

With his incredible attitude, with his incredible winning mentality, Cristiano Ronaldo is a unique player.

How do you mark Cristiano Ronaldo? You try not to leave him alone, don't let him shoot on his right foot. And Lionel Messi? Just make the sign of the cross. -Giorgio Chiellini