The 1998-99 campaign delivered a vital year of Serie A consolidation for Cagliari as Casteddu finished 13th, successfully securing their top-flight status after promotion. The team was a formidable force at the Stadio Sant'Elia, building their survival on exceptional home form that included a 5-0 demolition of Sampdoria and a thrilling 4-3 victory over Roma. Spearheading the attack was the prolific striker Roberto Muzzi, whose 16 crucial league goals made him one of Serie A's top five scorers that season. The campaign, which also featured the exciting talent of Fabián O'Neill, marked a determined effort by the club to remain in Italy's elite league.. The 1999-00 campaign delivered a deeply frustrating season for Cagliari, or Casteddu, as they battled in vain to maintain their Serie A status. The team finished a crushing 17th with only three victories all season, resulting in immediate relegation to Serie B after just a two-season spell in the top flight. Leading the attack in this difficult year was the Cameroonian forward Patrick M'Boma, whose 8 league goals topped the scoring charts for the Sardinians. Despite the presence of talents like Daniele Berretta and a young David Suazo, the lack of consistency led to a painful return to the second tier, marking an unforgettable chapter of disappointment for the club's loyal following.