Juventus might not take the game very serious, reason being that they are always at a safe place on the standings.
But this is the last match of Serie A this season, Juventus must play seriously because the fans need Juventus to close the season with a win. So I think Fiorentina will be knocked out of 7th place by atlanta. Atlanta is optimistic about the european league, just look at atlanta's last five matches in Serie A, atlanta has only lost once
Juventus last match in Serie A this season may not be so important, because Juventus position is already safe in 4th position.
But that doesn't mean Juventus let Fiorentina win easily, because as you said it is likely that Juventus will give their best performance
against Fiorentina to make Juventus supporters happy. If we look at the better quality of Juventus players, and also Juventus performance is
also better in the last 5 matches in Serie A, compared to Fiorentina's disappointing performance in the last 5 matches. So it looks like
Fiorentina will drop points against Juventus. Meanwhile, Atalanta, who have the same points as Fiorentina, have a greater chance of winning.
Because Atalanta in the last Serie A match was lucky enough to only face Empoli which is a weak team. I also predict Atalanta will replace
Fiorentina and will be in the top 7.