The Lazio team was in very good form. But in the last two matches I have not seen a better performance than Lazio. They lost against Bologna and shared the points with Roma in the last match. The Lazio team is in a bit of a weak position now. However, I don't think Lazio have the temperament to drop points against Salernitana. The Salernitana team is very weak. They are at the last position in the points table. The Salernitana team could not win even one of the 12 matches. Although this is Salerno's home match, Lazio will be favorites in this match. And I guess Lazio will get a narrow win of 1-0 or 2-0. Lazio's attack is not strong. So they probably won't be able to win by a big margin.
They should have been able to avoid the defeat against Bologna but unfortunately they were unable to do so and the draw against Roma must be tolerated considering that Roma's defense was slightly better. In fact, it is normal if we see Lazio's performance which is not very stable and unfortunately they are quite far away in 10th position in the standings after losing important points.
Salernitana is actually quite an easy opponent but sometimes this team is very annoying when defending and sometimes makes it difficult for their opponents to score goals. But as you said, if Lazio wins by a narrow score and they can maintain it then they will get 3 points again. But that is something that rarely happens and Lazio must be at least 2 goals ahead to secure victory.