Naomi Osaka, of Japan, serves to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, serves to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, returns to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, serves to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, returns to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, serves to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, walks on the court during a changeover in a match against Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, returns to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, returns to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Viktorija Golubic, of Switzerland, serves to Naomi Osaka, of Japan, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, arrives for a tennis match against Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, bottom, of Japan, returns to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, prepars to serve to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, adjusts her racket during a second round tennis match against Viktorija Golubic, of Switzerland, at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, serves to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, reacts during a second round tennis match against Viktorija Golubic, of Switzerland, at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, serves to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, returns to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, prepares to return to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Viktorija Golubic, of Switzerland, returns to Naomi Osaka, of Japan, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, returns to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Viktorija Golubic, of Switzerland, returns to Naomi Osaka, of Japan, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, returns to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, serves to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

FILE - In this July 26, 2021 file photo, Naomi Osaka, of Japan, adjusts her racket during a second round tennis match against Viktorija Golubic, of Switzerland, at the 2020 Summer Olympics, in Tokyo, Japan. Osaka and Simone Biles are prominent young Black women under the pressure of a global Olympic spotlight that few human beings ever face. But being a young Black woman -- which, in American life, comes with its own built-in pressure to perform -- entails much more than meets the eye. (AP Photo/Patrick Semansky, File)

Naomi Osaka, of Japan, prepares to return to Viktorija Golubic, of Switzerland, during second round of the tennis competition at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)