Theo was a personal signing made by Maldini from Real Madrid.
He recalled to Bein Sport: "Theo is excellent for Milan. He had already won the Champions League with Real Madrid. He was getting lost a bit. When we both spoke, I didn't listen to what they said about him. I found a sensitive boy who thirsted for revenge.
"I told him he had to work. I believed in him, the club believed in him. He was the most expensive purchase with Rafael Leão last year. His response on the pitch was exceptional. I think he must be programmed to play for the French team as a starter.
"He must want to be one of the top three (in the world) in defence."