FIBA EuroBasket - the main basketball competition contested biennially by the men's national teams governed by FIBA Europe is EuroBasket. EuroBasket has used a number of different formats, ranging from the simple round-robin used in 1939 to the three-stage tournament currently in use. The twenty-four qualified teams are placed into four groups of six, and each group plays a round-robin tournament. The top four teams in each Qualifying Group advance to the knockout stage. The knockout stage is a single-elimination tournament;