Bologna, Lazio or Fiorentina can easily displace Roma in the standings because Roma have one more game played... For now, there is one fourth place in the Champions League zone, for which there will be a fight among many clubs... I think that the first three places will remain for Inter, Juventus and Milan...
This looks somehow to me because I'm trying to understand if it's Lazio and fiorentina that has performed below average that will be able to replace Roma even if I know Roma hasn't done any better tho but Roma is more considerable then you will with fiorentina, Lazio is performing below their known performance last season but the are still at a fair position on the table.
If Rossi is consistent enough even if he's new but he's started on a very good not and if he's consistent not loosing any game further, even with a draw he can be sure to help the team stay at the fourth position and secure a champions league spot for next season. Lazio is the next with such chances but it still depends on their performance. Bologna hasn't be really bad and can possibly displace Roma but they will have to find a weakness for Roma upon which they will take advantage and see to displacing them to secure the fourth position and aswell a spot at the UCL.