Lazio have only 3 wins in the last 10 games (if you take into account all tournaments) they are on an obvious decline, while Roma in Serie A has a series of 7 wins in a row. The trend of this confrontation is obvious. In the next round Roma plays Juventus, the game will be in Rome. There is a high probability that Roma after the next round will begin to claim Juventus' place. But if Roma lose points, Lazio and Fiorentina will be ready to take advantage.
I almost forgot that Lazio is one of the top clubs in Serie A. But in fact, Lazio's performance has been declining especially since the middle of the season. Only in the UEFA Europa League can this club's performance be quite good and currently they are in the Quarter-finals. While in Serie A? With 2x more attack statistics, even the number of goals is the same as Torino.