What is the most difficult thing in football? It's not losing, but losing to your city rivals! The Rome derby has always been hailed as the most explosive match in Serie A, concerning not only three points but also the dignity and faith of the city. In the Rome derby on the early morning of January 6th, Roma won 2-0 against Lazio with goals from Pellegrini and Salamakors. However, behind this victory lies two very different stories for both teams. For Roma, it was a long-awaited and inspiring victory, while Lazio fell out of the title race due to this defeat. Looking at the performances of both teams, this was not just a win or loss in a derby, but a true reflection of the competitive situation in Serie A this season: upper echelon stratification, three powers vying for the championship, and mid-table teams locked in fierce competition. Who can hold on until the end will be the real winner? If we go back to the beginning of the season, when talking about Lazio, many people would give them a thumbs up: "Impressive!" At that time, they played fluidly, even traditional giants like Juventus, Fiorentina, and AC Milan had to take a back seat. Their performance in the first half of the season was stunning. But reality can be harsh, and recently Lazio's form has plummeted like a roller coaster. This Rome derby was a microcosm of their recent problems. Where does Lazio's problem lie? Simply put, one word: instability. Several key players who were once the team's trump cards…