There is no doubt that AC Milan performed brilliantly against Sassuolo. Milan dominated the entire match. Honestly, we expect such a great performance from a team like Milan. However, Milan's performance this season has been very inconsistent. Despite winning by a large margin against Sassuolo, Milan has shared points with teams like Juventus and Cagliari in the previous two matches. Milan is in seventh place in the points table due to its irregular performance.
Milan is going to face Atalanta in the next match. I consider Atalanta to be the favorite. Atalanta is a very strong team. Atalanta has probably won the last 7 matches in a row in Serie A. It will be very difficult for Milan to win in Atalanta's home match.
Sassuolo is in Serie B this year and I doubt they used all their top player for the game.
The only thing that matters to them is not having injuries for the Serie B championship and be able to be back in Serie A this year.
I also doubt they played at their 100% for no reason.