Atalanta will play a game that will decide if they are going to be third or fourth, which I feel like isn't really all that bad, I think that could work very well for them. The reality is that we are not going to end up with anything major, we are going to probably see Atalanta be third and they are going to be above Juventus.
This would be the nail in the coffin for Juventus, they already had a bad season, third place would be at least what they can do, they got the cup which is a great achievement but they wanted to finish at least third, being fourth behind Atalanta is not acceptable for the fans, which is going to really hurt the chances for Juventus next year as well, they will play a bit more games and get tired.
They need a win to be in 3rd place in the standings, and if they look at the opportunities that exist, they are very capable of winning the match, because they will also play as hosts in this match.
Atalanta will probably be motivated to be in 3rd place, and they also want to give their fans a win for the last time this season. So they will maximize this match in my opinion.
But this is a match that is already indecisive for Fiorentina, so I don't think they will be serious in this match. They will probably focus more on their final match in the Conference League, because there they still have quite an open opportunity.