Not 100% sure on the tiebreakers but this was a bad result for Slovakia. Denmark and Slovakia are now on 4 points, if Italy beats Denmark in regulation they'll also be on 4 points. If the 3 way tiebreaker is h2h points it would put Italy 6th, Slovakia 7th, Denmark 8th, but since Denmark can't be relegated(next years host) then Slovakia goes down.
Of course with 2 or 3 games let for everyone there's still a lot that can change with upsets and stuff.
So Italy might not need 4 more points now to avoid relegation if this very specific scenario happens.