Germany's Dimitrij Ovtcharov reacts after winning the table tennis men's singles quarterfinal match against Brazil's Hugo Calderano at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Germany's Dimitrij Ovtcharov reacts during the table tennis men's singles quarterfinal match against Brazil's Hugo Calderano at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Germany's Dimitrij Ovtcharov competes during the table tennis men's singles quarterfinal match against Brazil's Hugo Calderano at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Germany's Dimitrij Ovtcharov reacts after winning the table tennis men's singles quarterfinal match against Brazil's Hugo Calderano at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

A volunteer wears plastic gloves at the table tennis men's singles quarterfinal match at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Germany's Dimitrij Ovtcharov and Brazil's Hugo Calderano compete during the table tennis men's singles quarterfinal match at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Germany's Dimitrij Ovtcharov reacts during the table tennis men's singles quarterfinal match against Brazil's Hugo Calderano at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Germany's Dimitrij Ovtcharov competes during the table tennis men's singles quarterfinal match against Brazil's Hugo Calderano at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Germany's Dimitrij Ovtcharov reacts during the table tennis men's singles quarterfinal match against Brazil's Hugo Calderano at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Brazil's Hugo Calderano reacts after losing the table tennis men's singles quarterfinal match against Germany's Dimitrij Ovtcharov at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Brazil's Hugo Calderano gestures during the table tennis men's singles quarterfinal match against Germany's Dimitrij Ovtcharov at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Germany's Dimitrij Ovtcharov competes during the table tennis men's singles quarterfinal match against Brazil's Hugo Calderano at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Brazil's Hugo Calderano reacts after losing the table tennis men's singles quarterfinal match against Germany's Dimitrij Ovtcharov at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Brazil's Hugo Calderano competes during the table tennis men's singles quarterfinal match against Germany's Dimitrij Ovtcharov at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Brazil's Hugo Calderano reacts after losing the table tennis men's singles quarterfinal match against Germany's Dimitrij Ovtcharov at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong competes against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong competes against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

Taiwan's Lin Yun-Ju competes against China's Fan Zhendong during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

Taiwan's Lin Yun-Ju serves against China's Fan Zhendong during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong serves against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong gestures during his table tennis men's singles semifinal match against Taiwan's Lin Yun-Ju at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong serves against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong reacts during his table tennis men's singles semifinal match against Taiwan's Lin Yun-Ju at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

Taiwan's Lin Yun-Ju serves against China's Fan Zhendong during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

Taiwan's Lin Yun-Ju competes against China's Fan Zhendong during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong serves against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong competes against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong serves against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

Taiwan's Lin Yun-Ju serves against China's Fan Zhendong during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong gestures during his table tennis men's singles semifinal match against Taiwan's Lin Yun-Ju at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong returns a ball against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

Taiwan's Lin Yun-Ju gestures during his table tennis men's singles semifinal match against China's Fan Zhendong at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

Taiwan's Lin Yun-Ju competes against China's Fan Zhendong during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

Taiwan's Lin Yun-Ju gestures during his table tennis men's singles semifinal match against China's Fan Zhendong at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong reacts after defeating Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/David Goldman)

China's Fan Zhendong returns a ball against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Fan Zhendong, right, competes against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/David Goldman)

China's Fan Zhendong gestures during his table tennis men's singles semifinal match against Taiwan's Lin Yun-Ju at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

Taiwan's Lin Yun-Ju looks down during his table tennis men's singles semifinal match against China's Fan Zhendong at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

Ugo Humbert, of France, returns to Karen Khachanov, of the Russian Olympic Committee, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

China's Fan Zhendong celebrates his victory over Taiwan's Lin Yun-Ju at the end of the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/Kin Cheung)

Ugo Humbert, of France, gestures during a quarterfinal men's tennis match against Karen Khachanov, of the Russian Olympic Committee, at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Ugo Humbert, of France, returns to Karen Khachanov, of the Russian Olympic Committee, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Taiwan's Lin Yun-Ju wipes his face during the table tennis men's singles semifinal against China's Fan Zhendong at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/David Goldman)

China's Fan Zhendong, right, reacts while competing against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/David Goldman)

Karen Khachanov, of the Russian Olympic Committee, returns to Ugo Humbert, of France, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Ugo Humbert, of France, returns to Karen Khachanov, of the Russian Olympic Committee, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Ugo Humbert, of France, returns to Karen Khachanov, of the Russian Olympic Committee, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Karen Khachanov, of the Russian Olympic Committee, prepares to serve to Ugo Humbert, of France, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Taiwan's Lin Yun-Ju, left, competes against China's Fan Zhendong during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/David Goldman)

Ugo Humbert, of France, walks on the court during a quarterfinal men's tennis match against Karen Khachanov, of the Russian Olympic Committee, at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Ugo Humbert, of France, returns to Karen Khachanov, of the Russian Olympic Committee, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Karen Khachanov, of the Russian Olympic Committee, returns to Ugo Humbert, of France, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Empty seats are seen past Karen Khachanov, of the Russian Olympic Committee, as he serves to Ugo Humbert, of France, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Ugo Humbert, of France, prepares to serve to Karen Khachanov, of the Russian Olympic Committee, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Karen Khachanov, of the Russian Olympic Committee, wipes sweat from his brow during a quarterfinal men's tennis match against Ugo Humbert, of France, at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Ugo Humbert, of France, returns to Karen Khachanov, of the Russian Olympic Committee, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Karen Khachanov, of the Russian Olympic Committee, serves to Ugo Humbert, of France, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

China's Fan Zhendong, left, competes against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/David Goldman)

China's Fan Zhendong, left, serves against Taiwan's Lin Yun-Ju during the table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/David Goldman)

Ugo Humbert, of France, serves to Karen Khachanov, of the Russian Olympic Committee, during the quarterfinal round of the men's tennis competition at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Ugo Humbert, of France, gestures during a quarterfinal men's tennis match against Karen Khachanov, of the Russian Olympic Committee, at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Ugo Humbert, of France, walks off the court after losing a quarterfinal men's tennis match to Karen Khachanov, of the Russian Olympic Committee, at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Taiwan's Lin Yun-Ju, bottom, competes against China's Fan Zhendong during a table tennis men's singles semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo. (AP Photo/David Goldman)

Ugo Humbert, of France, walks off the court after losing a quarterfinal men's tennis match to Karen Khachanov, of the Russian Olympic Committee, at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Karen Khachanov, of the Russian Olympic Committee, poses with the silver medal in the men's single of the tennis competition at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Karen Khachanov, of the Russian Olympic Committee, poses with the silver medal in the men's single of the tennis competition at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)