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. (*)