Former AC Milan coach Arrigo Sacchi was left impressed by their win at Napoli on Sunday.
Olivier Giroud struck for the 1-0 win.
Sacchi told La Gazzetta dello Sport: "Who did I like most about Milan? Two above all: Rafael Leao and Theo Hernandez.
"Leao seems to have a moped, while the others ride a bicycle. He points the opponent and jumps him with impressive ease. Now he has to become good at giving continuity to his actions.
"And then Hernandez, when he is physically all right, is really good. a bull: he has strength and endurance. He never gives up. "
In injury time he had the energy to sprint sixty metres and give (Alexis) Saelemaekers a golden assist. I also really liked (Ismael) Bennacer: excellent in the pressing phase and in distributing the game. And I've seen (Franck) Kessie growing as well."