AC Milan have produced plenty of great sides, but few altered the game quite like Arrigo Sacchi’s team of the late 1980s.

Sacchi arrived in 1987 as an unconventional appointment, but quickly set about dismantling some of the assumptions of Italian football. Milan would not retreat, man-mark and wait. They defended high, pressed collectively and used zonal marking and the offside trap to compress the pitch. As Carlo Ancelotti later put it: “We defended by attacking and pressing.”

Sacchi’s methods could be obsessive. Training drills were sometimes conducted without a ball, players moving in relation to an imaginary one until positioning became instinctive. Individual quality mattered, but only within the structure of the team.

There was plenty of quality to work with. Ruud Gullit brought power and invention, Marco van Basten elegance and goals, and Frank Rijkaard intelligence and versatility. Behind them, Franco Baresi marshalled a back four completed by Mauro Tassotti, Alessandro Costacurta and Paolo Maldini.

The performance that came to define them arrived against Real Madrid in the 1988-89 European Cup semi-final. After drawing 1-1 at the Bernabéu, Milan overwhelmed Madrid 5-0 at San Siro. Steaua București were beaten 4-0 in the final, Gullit and Van Basten scoring twice each.


The shirts of Sacchi’s Milan

The Kappa home shirt worn during this period became one of the defining images of the side: red and black stripes, the Mediolanum sponsor across the chest and, in 1988-89, the tricolore shield marking the Serie A title won the previous season.

That league triumph proved harder to repeat. Milan finished third in 1988-89 and second the following season, with their greatest successes instead arriving in Europe.

Curiously, neither the famous striped home shirt nor the white away shirt with its red-and-black chest band was worn for those defining European Cup finals. Against Steaua București in 1989, and Benfica a year later, Milan instead played in an almost entirely white strip, distinguished by a two-tone collar.

It became an unlikely symbol of the era. Two finals, two victories, and consecutive European Cups.


More than a great team

Those back-to-back European triumphs secured Sacchi’s Milan a place among the game’s great sides. In Italy, they became known as Gli Immortali — “the Immortals” — a name that reflected not only what they won, but the lasting influence of the football they played.

Their pressing, compactness and coordinated movement anticipated much of what became commonplace in elite European football.

That is why this Milan side endures. The football, the players and even the shirts remain instantly recognisable more than three decades later. Milan did not simply master their era; they helped shape what came next.