Top 20 Greatest Club Football Seasons – ranked from lowest to highest

18. Porto – 2003/04 (Manager: José Mourinho)

Trophies: Primeira Liga, UEFA Champions League, Portuguese Super Cup
An underdog Porto team stunned Europe, led by Deco and Carvalho. Mourinho’s tactical mastery helped them topple Manchester United and dominate Monaco in the final.

17. Borussia Dortmund – 2011/12 (Manager: Jürgen Klopp)

Trophies: Bundesliga, DFB-Pokal
Dortmund bounced back from a poor start to go unbeaten domestically from September. A 5-2 win over Bayern in the cup final capped a record-breaking season.

16. Chelsea – 2009/10 (Manager: Carlo Ancelotti)

Trophies: Premier League, FA Cup
Chelsea secured their first domestic double and broke the 100-goal barrier in the Premier League. Drogba and Lampard delivered in one of the club’s finest years.

15. Juventus – 1983/84 (Manager: Giovanni Trapattoni)

Trophies: Serie A, European Cup Winners’ Cup
A squad featuring Platini, Rossi, and Boniek won Juventus their first and only Cup Winners’ Cup while also securing the league title in a tight race with Roma.

14. Paris Saint-Germain – 2015/16 (Manager: Laurent Blanc)

Trophies: Ligue 1, Coupe de France, Coupe de la Ligue, Trophée des Champions
PSG became the first club to win all four domestic trophies in back-to-back seasons. Their dominance in France was absolute, though they fell short in Europe.

13. Celtic – 1966/67 (Manager: Jock Stein)

Trophies: Scottish League, Scottish Cup, League Cup, Glasgow Cup, European Cup
The “Lisbon Lions” became the first British club to win the European Cup. They won every tournament they entered and played some of the most attacking football ever seen.

12. Real Madrid – 2016/17 (Manager: Zinedine Zidane)

Trophies: La Liga, UEFA Champions League, UEFA Super Cup, FIFA Club World Cup
Madrid won their first league title in five years and became the first modern club to defend the Champions League. They swept aside Juventus in the final.

11. AC Milan – 1993/94 (Manager: Fabio Capello)

Trophies: Serie A, Supercoppa Italiana, UEFA Champions League
Milan conceded only 15 league goals and destroyed Barcelona 4-0 in the Champions League final. Their tactical discipline and star-studded backline defined the era.

10. Arsenal – 2003/04 (Manager: Arsène Wenger)

Trophies: Premier League
Arsenal went unbeaten through all 38 league matches, a unique Premier League achievement. The “Invincibles” mixed physicality, grace, and total control of games.

9. Liverpool – 1983/84 (Manager: Joe Fagan)

Trophies: First Division, League Cup, European Cup
The first English club to win three major trophies in one season. They triumphed over Roma in the European Cup final — in Rome — to crown their golden generation.

8. Manchester City – 2018/19 (Manager: Pep Guardiola)

Trophies: Premier League, FA Cup, League Cup, Community Shield
City swept every domestic competition, including a 6-0 FA Cup final win and 14 straight victories to clinch the league. Their squad depth and precision were unmatched.

7. Ajax – 1971/72 (Manager: Ștefan Kovács)

Trophies: Eredivisie, KNVB Cup, European Cup
Total Football in its purest form. Ajax scored 104 league goals and defeated Inter in the European Cup final as Cruyff and company defined an era.

6. Inter Milan – 2009/10 (Manager: José Mourinho)

Trophies: Serie A, Coppa Italia, UEFA Champions League
Inter became Italy’s only treble winners by shutting out Barcelona in the semifinals and beating Bayern in the final. Mourinho’s tactics were masterful.

5. Manchester United – 1998/99 (Manager: Sir Alex Ferguson)

Trophies: Premier League, FA Cup, UEFA Champions League
United’s treble was achieved with resilience and late heroics. They eliminated Arsenal, Juventus, and Bayern in unforgettable fashion to define an era.

4. Bayern Munich – 2012/13 (Manager: Jupp Heynckes)

Trophies: Bundesliga, DFB-Pokal, UEFA Champions League
Bayern rebounded from 2012’s heartbreak by winning the treble with dominance and precision. They beat Dortmund at Wembley and set domestic records throughout.

3. Ajax – 1994/95 (Manager: Louis van Gaal)

Trophies: Eredivisie, UEFA Champions League, Dutch Super Cup
This young, academy-built side went unbeaten in both league and Champions League. They beat Milan in the final and launched careers of Seedorf, Davids, and Kluivert.

2. Bayern Munich – 2019/20 (Manager: Hansi Flick)

Trophies: Bundesliga, DFB-Pokal, UEFA Champions League, UEFA Super Cup, FIFA Club World Cup, DFL Supercup
Bayern went unbeaten in Europe and scored 8 against Barcelona. They won all 11 Champions League games — a first — and added two more trophies the following season for a six-title haul.

1. Barcelona – 2008/09 (Manager: Pep Guardiola)

Trophies: La Liga, Copa del Rey, UEFA Champions League, Supercopa de España, UEFA Super Cup, FIFA Club World Cup
Guardiola’s debut season ended in an unprecedented sextuple. With Messi, Xavi, and Iniesta orchestrating, Barcelona didn’t just win — they changed football forever.