Fiorentina always makes it difficult for their opponents who play at home because they have more strength when playing at home, however, AC Milan will not just let defeat happen to them. AC Milan will try as much as possible to get the full three points so they can sit comfortably in their position. secondly because Juventus and AC Milan are still fighting for the runner up position. Either AC Milan or Juventus both still have the opportunity to overtake depending on their efforts to maintain consistency.
AC Milan and Fiorentina are quite strong teams but I am sure that AC Milan will fight with all their might to win. Currently AC Milan is in second place on the standings so it is impossible for them to miss the opportunity to get additional points in the match against Fiorentina. As you said, Juventus is currently also in third place with a very narrow point difference with AC Milan, therefore this time AC Milan must continue to try to win.
All teams will fight hard to win, especially as Fiorentina and C Milan are the two top Serie A teams, of course making this match full of prestige.
In terms of performance, AC Milan is very good right now, but Fiorentina, who will be playing at home, of course doesn't want to just lose points, both teams have their own motivations in this match and what is clear is that this match will be fierce and difficult for both teams.
The Italian Serie A is one of the top five leagues in Europe and at such, winning the league is without doubt a very important achievement that every Italian club will want to achieve as much as they can but at the moment, neither AC Milan or Fiorentina is in a good position to lift the scudetto as far as this season is concerned instead the two clubs are in the quarter finals of two different European competitions which the first leg of the two legged ties will be played next two week Thursday and that's why I don't think their upcoming league game against each other will be too important to both teams.
Next two week Thursday, AC Milan will host Roma for their first leg of the UEFA Europa League quarter final tie while Fiorentina will travel to Viktoria Plzen for the first leg of their UEFA Conference League game. Fiorentina will definitely want to win the game against AC Milan this weekend while the second placed team in the Italian Serie A will also be going for a win but I think they'll not be giving their all in that game when they know there's a more important game coming up soon