In fact, we could see some changes in the formation modules. The coach could go with the 4-3-3 system with Tonali, Bennacer and Yacin Adli in midfield while Charles De Ketelaere, Olivier Giroud and Rafael Leao are in the attack.
There is the idea of 3-4-3 with Kalulu Kjaer and Tomori in defence. Tonali and Bennacer would be in front of the three defenders while Theo Hernandez and Davide Calabria would be the wing-backs.
In any case, Milan and Pioli chose De Ketelaere because he reads the game and situations very well, he can start as an attacking midfielder and exchange positions with Junior Messias, Rafael Leao or Olivier Giroud during the match.