China's Chen Meng celebrates after winning the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng celebrates with her coach Ma Lin after winning the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng celebrates after winning the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng reacts during the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng reacts during the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

An staff member puts a tape to cover the commercial brand on the pant of Hong Kong's Doo Hoi-kem during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Hong Kong's Doo Hoi-kem serves during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng competes during the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

A tape comes off from the pant of Hong Kong's Doo Hoi-kem as an staff member puts a tape to cover the commercial brand during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Hong Kong's Doo Hoi-kem reacts after the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng reacts during the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng competes during the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng reacts during the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng competes during the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng competes during the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Hong Kong's Doo Hoi-kem competes during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Hong Kong's Doo Hoi-kem reacts during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

An staff member from Hong Kong team puts a tape to cover the commercial brand on the pant of Hong Kong's Doo Hoi-kem during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

A tape comes off from the pant of Hong Kong's Doo Hoi-kem as an staff member puts a tape to cover the commercial brand during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Hong Kong's Doo Hoi-kem looks on during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng competes during the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng celebrates after winning the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng competes during the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

China's Chen Meng competes during the table tennis women's singles quarterfinal match against Hong Kong's Doo Hoi-kem at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Hong Kong's Doo Hoi-kem competes during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

An staff member puts a tape to cover the commercial brand on the pant of Hong Kong's Doo Hoi-kem during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Hong Kong's Doo Hoi-kem reacts after the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Hong Kong's Doo Hoi-kem and China's Chen Meng claps paddles after the table tennis women's singles quarterfinal match at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Hong Kong's Doo Hoi-kem, right, talks to her coach during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)

Hong Kong's Doo Hoi-kem competes during the table tennis women's singles quarterfinal match against China's Chen Meng at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Kin Cheung)