3-on-3 basketball, explained: Teams, rules & more to know about new sport at 2021 Olympics Unknown 06:46 Here is everything you need to know about 3-on-3 basketball at the 2021 Olympics. Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsConte continues to back Chelsea's plan despite cup exitZidane plays with fire and loses as Real Madrid suffer Copa humiliationZidane: My job is on the line against PSGBert Van Marwijk appointed Socceroos coach for World Cup in RussiaCHAN 2018 Group D Wrap: Anguish for Cameroon, Burkina Faso as Congo, Angola go throughLeganes make history by dumping Real Madrid from the Copa del Rey