Milan and Celtics former player Donati had an evaluation of the defenders Aje and Kjaer in an interview a few days ago.
Donati said: "Age played very well at the central defender position. He is very physical. Although he will not have any particularly amazing performance in the game, he is very stable. There is no doubt about this. "
"When comparing Age and Kayar, we can see that their physical fitness, sense of position and handling of high-altitude balls are very similar."