L-R: Xu Jiayu, Yan Zibei, Zhang Yufei and Yang Junxuan of China pose with their silver medals after competing in the mixed 4x100m medley relay final in the Tokyo Olympics at Tokyo Aquatics Centre in Tokyo, Japan, 2021. /CFP

Caeleb Dressel of the U.S. celebrates after breaking the world record to win men's 100m butterfly final in the Tokyo Olympics at Tokyo Aquatics Centre, 2021. /CFP

Kaylee McKeown of Australia celebrates after winning women's 200m backstroke final in the Tokyo Olympics at Tokyo Aquatics Centre, 2021. /CFP

Kathleen Ledecky of the U.S. celebrates after winning the gold medal in women's 800m freestyle final in the Tokyo Olympics at Tokyo Aquatics Centre, 2021. /CFP

Wang Jianjiahe of China competes in women's 800m freestyle final in the Tokyo Olympics at Tokyo Aquatics Centre, 2021. /CFP

L-R: Adam Peaty, James Guy, Anna Hopkin and Kathleen Dawson celebrate with their gold medals after breaking the world record to win the mixed 4x100m medley relay final in the Tokyo Olympics at Tokyo Aquatics Centre, July 31, 2021. /CFP

Chen Qingchen (L)/Jia Yifan of China celebrate after defeating Kim So-yeong/Kong Hee-yong of South Korea in badminton women's doubles semifinal match in the Tokyo Olympics at Musashino Forest Sport Plaza in Tokyo, Japan, July 31, 2021. /CFP

Chen Long of China competes in badminton men's singles semifinal match in the Tokyo Olympics at Musashino Forest Sport Plaza, July 31, 2021. /CFP

Chen Yufei of China celebrates after defeating her compatriot He Bingjiao in badminton women's singles semifinal match in the Tokyo Olympics at Musashino Forest Sport Plaza, July 31, 2021. /CFP

Lyu Xiaojun of China competes and wins weightlifting men's 81kg event in the Tokyo Olympics at Tokyo International Forum in Tokyo, Japan, July 31, 2021. /CFP

Lu Yunxiu of China celebrates with her gold medal after winning women's windsurfer RS:X medal race in the Tokyo Olympics at the Enoshima Yacht Harbour in Fujisawa, Kanagawa Prefecture, Japan, July 31, 2021. /CFP

Bi Kun of China celebrates with his bronze medal after competing in men's windsurfer RS:X medal race in the Tokyo Olympics at the Enoshima Yacht Harbour, July 31, 2021. /CFP

Dong Dong of China competes in men's trampoline gymnastics final in the Tokyo Olympics at the Ariake Gymnastics Centre in Tokyo, Japan, July 31, 2021. /CFP

Huang Changzhou of China competes in men's long jump in the Tokyo Olympics at the Olympic Stadium in Tokyo, Japan, July 31, 2021. /CFP

Gold medalist Elaine Thompson-Herah (C) poses with her compatriots second-placed Shelly-Ann Fraser-Pryce (L) and third-placed Shericka Jackson after finishing women's 100m sprinting final in the Tokyo Olympics at the Olympic Stadium, July 31, 2021. /CFP

Ge Manqi (L) of China competes in women's 100m sprinting semifinal in the Tokyo Olympics at the Olympic Stadium, July 31, 2021. /CFP

Lee Yang(L)/Wang Chi-lin of Chinese Taipei pose with their gold medals after winning badminton men's doubles final in the Tokyo Olympics at Musashino Forest Sport Plaza in Tokyo, Japan, July 31, 2021. /CFP

Li Junhui (L)/Liu Yuchen of China pose with their silver medals after competing in men's doubles final in the Tokyo Olympics at Musashino Forest Sport Plaza, July 31, 2021. /CFP