Inter Milan 2009–10 — Mourinho's Treble Winners

Inter Milan's 2009–10 treble under José Mourinho set the gold standard for Italian clubs, as they became the first to win Serie A, Coppa Italia, and Champions League in a single season. The squad conceded just 34 goals in 38 league matches, the best defensive record that year, while scoring 75 goals. Their Champions League triumph featured a legendary semi-final defensive stand at Camp Nou, defending a 3–1 lead with 10 men for 90 minutes—outperforming #6 Juventus 2011–2020, who lost both of their UCL Finals. Milito scored both goals in the 2–0 final win over Bayern Munich, capping a campaign where Inter beat Chelsea, CSKA Moscow, and Barcelona en route to glory.