Mixed relays in athletics and swimming and three-a-side basketball were among new events approved on Friday by the International Olympic Committee (IOC) for inclusion in the Tokyo Games in 2020.
The IOC's executive board also agreed to add mixed doubles in table tennis, mixed team events in judo, shooting and archery and a mixed team triathlon.
Teams are given the freedom to line up in whichever order they choose, allowing for sizeable leads to develop, or collapse, as the race progresses.
Three-a-side basketball, an urban sport where the teams aim for the same hoop, was introduced at the Youth Olympic Games in Singapore 2010 and Nanjing in 2014.
It said there would be a net increase of 15 events, an overall reduction of 285 athletes compared to Rio in 2016 and "the highest representation of female athletes in Olympic history".
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