I just checked the table to see that Juventus is on 5th position with 37 points, two points behind Lazio. Since Juventus is a strong club, they will likely overtake Lazio with time, because I don't think that Lazio will be able to maintain the 4th position till the end of the season. Perhaps, the fourth position is open for the clubs on 4th-8th position on the table currently due to little point difference.
If you ask me, I think Juventus are not in a better form than Lazio, so I don't think they can finish ahead of Lazio with the way they Juventus plays. From the way they have been playing previously, they don't look like the team that wants to go out their and win games, their target is mainly score and then defend. Then the opponent starts coming at them to either equalise and win or they end up playing draw. Unless Juventus changes pattern, if not they will further go down if they only rely on playing draws instead of going out for the win in most of their games.