My concern in the latest win of Milan against Atalanta is the celebration by some players after the match ended. They celebrated like they have won the title already, hope it wont be a "too early" celebration but they fail to win it eventually because they were overconfidence with the situation. The last game of both Milan and Inter can be considered as guaranteed win for both teams but Milan should not underestimate Sassuolo as they can bring a disaster to Milan.
yes it's true AC Milan should not underestimate Sassuolo in their last match but quality-wise Atalanta are a tougher opponent to face by AC Milan so their celebration was a bit exaggerated when they were able to win the game, but AC Milan's confidence is very important and also mentality is very necessary for looking at 1 game remaining for them to confirm the Scudetto this season, against Sassuolo I think it will be a bit easy for AC Milan, they are really very close to the title. I don't doubt AC Milan to be champions.
AC Milan will make a big mistake if they think that Sassuolo is a weak team. Sassuolo is now 11th in the table. The performance of their last two matches was good enough. If Sassuolo were able to score the first goal of the match, it would be very difficult for Milan to win. Because Sassuolo will not play for the win against Milan. Their goal will be to draw the match. So if MIlan want to win the title, they have to play very carefully and get 3 points in this match.