Just finished looking at the remaining games of the season for: Udinese, Lazio, Roma, and Juventus. Udinese are in fourth place with 56pts, but they still have to play Roma, Napoli, Lazio, and AC Milan. So chances of them still being in fourth place at the end of the season is very slim.
Lazio have to play Inter, Juve, Udinese, and they have opponents like Parma, Genoa, and Catania still remaining, teams that could steal some points from them.
In my opinion Roma have the easiest remaining games out of the four, with only two dangerous teams (Udinese and Milan) that could take all three points from them. But we could hope for them to drop points against Palermo, Catania, Sampdoria, and Bari.
Now, we have a pretty tough schedule in my opinion, with Genoa, Fiorentina (away), Catania, Lazio (away), Chievo, Parma (away), and Napoli at home.
So there's still an opportunity to qualify for CL, Juventus just need to leave everything on the pitch when they play these last games.