The Quadruple
The Quadruple is a term used in football that refers to a club winning their country's top tier league and the two most highly regarded domestic cup competitions, as well as the top tier continental cup competition - the European Cup/Champions League under the UEFA confederation - all within a single season or caldendar year.
The FA Community Shield (or other similar minor trophies), UEFA Super Cup (or Super Cups from other confederations), Intercontinental Cup, or FIFA Club World Cup are never counted as part of The Quadruple. As with The Treble, it is possible to win 4 trophies in a season other than the top tier combination. A consensus view is that such an achievement should be called 'a quadruple' or 'quadruple' as a common noun with The Quadruple or Quadruple as a proper noun reserved for the top tier acheivement.
At present - in the majority of leagues - The Quadruple is the ultimate achievement, consisting of every major top tier trophy a club can win in a single season.
Continental Quadruple
To date, only Celtic FC has accomplished the feat in the 1967 season, winning:
- The Scottish Cup.
- The Scottish League Cup.
- The European Cup.
Domestic Quadruple
Sun Hei of Hong Kong won 4 trophies in the 2004–05 season.