The Ninepin Bowling Classic Singles World Cup is a biennial nine-pin bowling competition organized by the World Ninepin Bowling Association (WNBA NBC). The World Cup was started in 1989 and until 2003 took place every year. The next one was held in 2004 and take place biennially since then. The formula of the competition has changed many times. Since 2003, it has been played in the KO system. Since 2005 games for the 3rd place are not played, but two bronze medals are awarded. Since 2009, the World Cup is held simultaneously with the U23 World Cup.