A treble in association football is achieved when a club team wins three trophies in a single season. A 'continental treble' involves winning the club's national league competition, main national cup competition and a continental trophy. A 'domestic treble' involves winning three national competitions—normally the league title, the primary cup competition and one secondary competition.
This list includes clubs who have won their country's top-tier league and the primary cup competition (the double), in addition to the major continental tournament, all within a single season. This was first achieved in 1967 by Celtic, winning the Scottish Football League, Scottish Cup and European Cup.
|UEFA||Celtic||Scotland||1966–67||Scottish Football League, Scottish Cup, European Cup|
|Ajax||Netherlands||1971–72||Eredivisie, KNVB Cup, European Cup|
|PSV Eindhoven||1987–88||Eredivisie, KNVB Cup, European Cup|
|Manchester United||England||1998–99||Premier League, FA Cup, UEFA Champions League|
|Barcelona||Spain||2008–09||La Liga, Copa del Rey, UEFA Champions League|
|Internazionale||Italy||2009–10||Serie A, Coppa Italia, UEFA Champions League|
|Bayern Munich||Germany||2012–13||Bundesliga, DFB Pokal, UEFA Champions League|
|Barcelona (2)||Spain||2014–15||La Liga, Copa del Rey, UEFA Champions League|
- Double (association football)
- List of association football teams to have won four or more trophies in one season
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