[2][3] Cycling BMX racing and 10 km (6.2 mi) marathon swimming were included as official medal events for the first time in history.
[17] During and after the games, many athletes who were caught doping, or tested positive for banned substances, were disqualified from competition and had their medals revoked.
[22] Events in boxing result in a bronze medal being awarded to each of the two competitors who lose their semi-final matches, as opposed to fighting in a third place tie breaker.
[23] Other combat sports, which include judo, taekwondo, and wrestling, use a repechage system which also results in two bronze medals being awarded.
[26][27] ‡ Changes in medal standings (see below) * Host nation (China)Belarusian athletes Vadim Devyatovskiy and Ivan Tsikhan, who won silver and bronze respectively in the men's hammer throw, both tested positive for abnormal levels of testosterone.
[75][80] The IOC requested that the IAAF modify the results, and, after the CAS dismissed the appeal of Tatyana Lebedeva,[81] the medals were redistributed accordingly.