The 1990-91 campaign delivered a season of steady consolidation for Lazio as the Biancocelesti secured an 11th-place finish in Serie A under coach Dino Zoff, comfortably avoiding the relegation battle. Leading the charge was the brilliant Uruguayan forward Rubén Sosa, whose 11 league goals proved vital in a campaign built on defensive resilience and his individual attacking flair, including a goal in each Derby della Capitale draw. It was a foundational year that marked their continued re-establishment in the top flight and remains a defining chapter of the club's modern history.