Akani Simbine (L) of South Africa competes during the men's 100m final at Muller Anniversary Games at London Stadium in London, Britain, on July 20, 2019. Akani Simbine won the gold medal with 9.93 seconds. (Xinhua/Alberto Pezzali)

Akani Simbine of South Africa celebrates after the men's 100m final at Muller Anniversary Games at London Stadium in London, Britain, on July 20, 2019. Akani Simbine won the gold medal with 9.93 seconds. (Xinhua/Alberto Pezzali)

Akani Simbine of South Africa celebrates after the men's 100m final at Muller Anniversary Games at London Stadium in London, Britain, on July 20, 2019. Akani Simbine won the gold medal with 9.93 seconds. (Xinhua/Alberto Pezzali)