AC Milan 1988–1990 — Sacchi's Double European Champions

Arrigo Sacchi's AC Milan won back-to-back European Cups in 1989 and 1990, the Serie A title in 1988, and two Intercontinental Cups. They conceded just 14 goals in 18 European Cup games across both campaigns. The Dutch trio of Gullit, Van Basten (who scored 33 Serie A goals in 30 games in 1988–89), and Rijkaard were the attacking spine, while Baresi, Costacurta, Maldini, and Tassotti formed the most tactically coherent back four in football history. They went 58 competitive matches unbeaten between 1991 and 1993.