The 1990-91 campaign delivered a crucial season of consolidation for Cagliari, affectionately known as Casteddu, marking their hard-fought return to Serie A after a seven-year absence. Under the guidance of their influential young manager Claudio Ranieri, the team battled to a vital 14th-place finish, narrowly securing their top-flight status. Spearheading the attack was the young Uruguayan forward Daniel Fonseca, whose 8 goals proved decisive in a tense campaign built on sheer grit and the creative spark of veteran Enzo Francescoli. It was a pivotal year that successfully re-established the club in the Italian elite and remains a defining chapter in the rise of the Ranieri era.