Actually AC Milan is just three points away from Juventus which I don't see to really be a big deal in that Juventus can still be able to meet up or probably displace them depending on whatever the case maybe, if Juventus gets to win their next game they will be at equal points with AC Milan except if AC Milan aswell gets to win their own next fixture too but if it happens that they draw or win then Juventus will still be behind them.
The both team are currently on a tight position because they have a very close points but right now AC Milan is on a better chance because they have 3 point over Juventus and even if Juventus succeeded in wining there next match they may likely not going to beat AC Milan do to the fact that they will still be on equal points with AC Milan, and AC Milan still have a very good opportunity of increasing there points the more over Juventus because there next match will be against Fiorentina and from there performance I would say that AC Milan will win the match.
In essence, at this moment Juventus is at least experiencing a decline in performance and therefore, most will assume that it will be at least difficult for Juventus to return to second place by overtaking Milan. But indeed, if for example in the next matches Juventus succeeds in recovering and improving their performance then of course, Juventus will again have a chance to compete for second place with Milan. But yes, the bad scenario is that at least it seems that Juventus is still having difficulty recovering because they have experienced instability in the results obtained in every match recently. With these factors, the worst case scenario is that Juventus still has a chance to fall one more place to fourth place, but indeed, a team as big as Juventus should be able to still finish in third or second place at the end of this season.