ADO Den Haag (ADO stands for Alles Door Oefening, Everything Through Practice) is the main football club in the city of The Hague. The club was for a time known as FC Den Haag, with ADO representing the amateur branch of the club. Despite being from one of the traditional three large Dutch cities, it has not been able to match Ajax, Feyenoord or PSV Eindhoven in terms of success in the Eredivisie or in European competition. There is nonetheless a big rivalry with Ajax and Feyenoord.
ADO Den Haag won the Dutch national football title in 1942 and 1943 and the KNVB Cup in 1968 and 1975 (under the name FC Den Haag). Greatest European success was a quarter final game against West Ham United for the European Cup Winners Cup in 1976. A 4-2 win in The Hague followed by a 3-1 defeat in London meant elimination.
ADO supporters have strong links with Welsh club Swansea City. Flags of the respective clubs are often flown at the matches of the other club, and both clubs regularly hold pre-season friendly matches. Legia Warszawa (Poland), Club Brugge K.V. (Belgium) and Juventus F.C. (Italy) also share strong supporter links with ADO Den Haag.
After a long spell in the country's second tier of league football, ADO Den Haag played four seasons in the Eredivisie, they were relegated in the 2006-07 season, however after finishing 6th in the 2007-08 season they went on to win the play-offs meaning promotion back to the Eredivisie for 2008-09. The club's new home is the 15,000 seater Den Haag Stadion, there is not yet an official name for this stadium. They used to play the home games at the Zuiderpark Stadion, the ground will be sold for public housing. Their home colors are yellow and green. The average attendance in 2005/06 was 6,800 people, one of the lowest in the Eredivisie. They started the 2008-09 season with two wins, which put them on top of the Eredivisie for the first time in 32 years.