Riccardo Trevisani appeared on Pressing recently and discussed Milan and the current situation under Sergio Conceição.
Specifically, the commentator addressed some of the Portuguese coach's decisions, such as the substitution between Musah and João Félix:

"It seems that Milan cannot play without João Félix, even for one half. Milan was being dominated by Lazio, and the Musah-João Félix substitution was even more destabilizing. Milan looks like the Harlem Globetrotters. They play for entertainment, but there’s never any tactical idea of balance."
Finally, Trevisani concluded:
"The fans' protest? This team isn’t made up of players like Seedorf, Kaká, and Ronaldinho. If you boo from the first to the last minute, you’re not helping. But why does Maignan come out like that on a player who is going to the byline? Pavlovic shouldn’t have come in that way. And then I ask, why has Tomori become the fourth central defender for Milan?"
