Singapore's Yu Mengyu waves to her fans after winning the table tennis women's singles second round match against Portugal's Shao Jieni at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/Kin Cheung)

Singapore's Yu Mengyu competes during the table tennis women's singles second round match against Portugal's Shao Jieni at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/Kin Cheung)

Singapore's Yu Mengyu reacts during the table tennis women's singles second round match against Portugal's Shao Jieni at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/Kin Cheung)

Singapore's Yu Mengyu competes during the table tennis women's singles second round match against Portugal's Shao Jieni at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/Kin Cheung)

Singapore's Yu Mengyu waves to her fans after winning the table tennis women's singles second round match against Portugal's Shao Jieni at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/Kin Cheung)

Canada's Mo Zhang competes during the table tennis women's singles second round match against Yana Noskova at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/Kin Cheung)

Thailand's Paranang Orawan competes during the table tennis women's singles second round match against Czech Republic's Hana Matelova at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/Kin Cheung)

Thailand's Paranang Orawan reacts during the table tennis women's singles second round match against Czech Republic's Hana Matelova at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/Kin Cheung)

India's Manika Batra competes during the table tennis women's singles second round match against Ukrain's Margaryta Pesotska at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/Kin Cheung)

Liu Juan of the United States competes during the table tennis women's singles second round match against Slovakia's Barbora Balazova at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Liu Juan of the United States reacts after winning the table tennis women's singles second round match against Slovakia's Barbora Balazova at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Liu Juan of the United States competes during the table tennis women's singles second round match against Slovakia's Barbora Balazova at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Australia's Lay Jian Fang competes during the table tennis women's singles second round match against Poland's Li Qian at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Lily Zhang of the United States competes during the table tennis women's singles second round match against Nigeria's Offiong Edem at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Nigeria's Offiong Edem competes during the table tennis women's singles second round match against Lily Zhang of the United States at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Nigeria's Offiong Edem competes during the table tennis women's singles second round match against Lily Zhang of the United States at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Lily Zhang of the United States competes during the table tennis women's singles second round match against Nigeria's Offiong Edem at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Nigeria's Offiong Edem competes during the table tennis women's singles second round match against Lily Zhang of the United States at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Monaco's Yang Xiaoxin competes during the table tennis women's singles second round match against Bulgaria's Polina Trifonova at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Lily Zhang of the United States competes during the table tennis women's singles second round match against Nigeria's Offiong Edem at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Lily Zhang of the United States competes during the table tennis women's singles second round match against Nigeria's Offiong Edem at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Portugal's Fu Yu competes during the table tennis women's singles second round match against India's Sutirtha Mukherjee at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

India's Sutirtha Mukherjee competes during the table tennis women's singles second round match against Portugal's Fu Yuat the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Lily Zhang of the United States competes during the table tennis women's singles second round match against Nigeria's Offiong Edem at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng gestures during the table tennis women's singles third round match against Switzerland's Rachel Moret at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Canada's Zhang Mo reacts during the table tennis women's singles third round match against Germany's Petrissa Solja at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng competes during the table tennis women's singles third round match against Switzerland's Rachel Moret at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Canada's Zhang Mo competes during the table tennis women's singles third round match against Germany's Petrissa Solja at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Germany's Petrissa Solja competes during the table tennis women's singles third round match against Canada's Zhang Mo at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Germany's Petrissa Solja reacts during the table tennis women's singles third round match against Canada's Zhang Mo at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Canada's Zhang Mo competes during the table tennis women's singles third round match against Germany's Petrissa Solja at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Japan's Kasumi Ishikawa celebrates after winning the table tennis women's singles third round match against Thailand's Orawan Paranang at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Japan's Kasumi Ishikawa celebrates after winning the table tennis women's singles third round match against Thailand's Orawan Paranang at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Japan's Kasumi Ishikawa celebrates after winning the table tennis women's singles third round match against Thailand's Orawan Paranang at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Japan's Kasumi Ishikawa competes during the table tennis women's singles third round match against Thailand's Orawan Paranang at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Japan's Kasumi Ishikawa reacts during the table tennis women's singles third round match against Thailand's Orawan Paranang at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng competes during the table tennis women's singles third round match against Switzerland's Rachel Moret at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Canada's Zhang Mo competes during the table tennis women's singles third round match against Germany's Petrissa Solja at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Canada's Zhang Mo competes during the table tennis women's singles third round match against Germany's Petrissa Solja at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng talks to her coach during the table tennis women's singles third round match against Switzerland's Rachel Moret at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Singapore's Feng Tianwei reacts during the table tennis women's singles third round match against Spain's María Xiao at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Thailand's Suthasini Sawettabut competes during the table tennis women's singles third round match against Romania's Elizabeta Samara at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Japan's Kasumi Ishikawa celebrates after winning the table tennis women's singles third round match against Thailand's Orawan Paranang at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Japan's Kasumi Ishikawa celebrates after winning the table tennis women's singles third round match against Thailand's Orawan Paranang at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Japan's Kasumi Ishikawa competes during the table tennis women's singles third round match against Thailand's Orawan Paranang at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Japan's Kasumi Ishikawa competes during the table tennis women's singles third round match against Thailand's Orawan Paranang at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Japan's Kasumi Ishikawa celebrates after winning the table tennis women's singles third round match against Thailand's Orawan Paranang at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Singapore's Feng Tianwei competes during the table tennis women's singles third round match against Spain's María Xiao at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Thailand's Suthasini Sawettabut competes during the table tennis women's singles third round match against Romania's Elizabeta Samara at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Singapore's Feng Tianwei reacts during the table tennis women's singles third round match against Spain's María Xiao at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Singapore's Feng Tianwei,talks to her coach the table tennis women's singles third round match at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Romania's Elizabeta Samara competes during the table tennis women's singles third round match against Thailand's Suthasini Sawettabut at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Singapore's Feng Tianwei, right, and Spain's María Xiaoclap paddles after the table tennis women's singles third round match against at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Thailand's Suthasini Sawettabut competes during the table tennis women's singles third round match against Romania's Elizabeta Samara at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Singapore's Feng Tianwei competes during the table tennis women's singles third round match against Spain's María Xiao at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Thailand's Suthasini Sawettabut reacts during the table tennis women's singles third round match against Romania's Elizabeta Samara at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo. (AP Photo/Kin Cheung)

Iga Swiatek, of Poland, plays Paula Badosa, of Spain, during the second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Iga Swiatek, of Poland, plays Paula Badosa, of Spain, during the second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Paula Badosa, of Spain, reacts while playing Iga Swiatek, of Poland, during the second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Paula Badosa, of Spain, plays Iga Swiatek, of Poland, during the second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Paula Badosa, of Spain, is helped off the court in a wheelchair after retiring due to illness during the quarterfinals of the tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Paula Badosa, of Spain, is helped off the court in a wheelchair after retiring due to illness during the quarterfinals of the tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Paula Badosa, of Spain, is helped off the court in a wheelchair after retiring due to illness during the quarterfinals of the tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)