Naomi Osaka, of Japan, reacts after losing a point to Marketa Vondrousova, of the Czech Republic, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Naomi Osaka, of Japan, leaves center court after being defeated by Marketa Vondrousova, of the Czech Republic, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Naomi Osaka, of Japan, reacts after losing a point to Marketa Vondrousova, of the Czech Republic, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Naomi Osaka, of Japan, plays Marketa Vondrousova, of the Czech Republic, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Marketa Vondrousova, of the Czech Republic, reacts after winning a point off Naomi Osaka, of Japan, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Marketa Vondrousova, of the Czech Republic, plays Naomi Osaka, of Japan, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Marketa Vondrousova, of the Czech Republic, reacts after defeating Naomi Osaka, of Japan, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Naomi Osaka, of Japan, plays Marketa Vondrousova, of the Czech Republic, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Naomi Osaka, of Japan, reacts during a third round women's tennis match against Marketa Vondrousova, of the Czech Republic, at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Elina Svitolina, of the Ukraine, reacts after defeating Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Andy Murray, of Britain, reacts with teammate Joe Salisbury during a men's doubles tennis match against Kevin Krawietz and Tim Puetz, of Germany, at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Elina Svitolina, of the Ukraine, reacts after winning the second set playing against Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Diego Schwartzman, of Argentina, returns to Tomas Machac, of the Czech Republic, during second round of the men's tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Naomi Osaka, of Japan, reaches for a shot by Marketa Vondrousova, of the Czech Republic, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)