Naomi Osaka, of Japan, adjusts her mask after defeating Jennifer Brady, of the United States, during a semifinal match of the US Open tennis championships, Thursday, Sept. 10, 2020, in New York. (AP Photo/Seth Wenig)

Naomi Osaka, of Japan, holds up the championship trophy while posing for photographs at the Billie Jean King National Tennis Center Sunday, Sept. 13, 2020, in New York.(AP Photo/Frank Franklin II)

Naomi Osaka, of Japan, is driven away after posing for photographs at the Billie Jean King National Tennis Center Sunday, Sept. 13, 2020, in New York.(AP Photo/Frank Franklin II)

Naomi Osaka, of Japan, wears a Trayvon Martin mask before a fourth round match against Anett Kontaveit, of Estonia, at the US Open tennis championships, Sunday, Sept. 6, 2020, in New York. (AP Photo/Frank Franklin II)

Naomi Osaka, of Japan, pulls off her headphones as she walks on the court before playing against Victoria Azarenka, of Belarus, in the women's singles final of the US Open tennis championships, Saturday, Sept. 12, 2020, in New York. (AP Photo/Seth Wenig)

Naomi Osaka, of Japan, reacts after defeating Victoria Azarenka, of Belarus, in the women's singles final of the US Open tennis championships, Saturday, Sept. 12, 2020, in New York. (AP Photo/Seth Wenig)

Naomi Osaka, of Japan, holds up the championship trophy after defeating Victoria Azarenka, of Belarus, in the women's singles final of the US Open tennis championships, Saturday, Sept. 12, 2020, in New York. (AP Photo/Frank Franklin II)

YBN Cordae, left, celebrates with Naomi Osaka's coach, Wim Fissette, after Osaka defeated Victoria Azarenka, of Belarus, in the women's singles final of the US Open tennis championships, Saturday, Sept. 12, 2020, in New York. (AP Photo/Frank Franklin II)

Naomi Osaka, of Japan, reacts during the women's singles final against Victoria Azarenka, of Belarus, during the US Open tennis championships, Saturday, Sept. 12, 2020, in New York. (AP Photo/Seth Wenig)

Naomi Osaka, of Japan, wears a mask in honor of Breonna Taylor before her match against Misaki Doi, of Japan, during the first round of the US Open tennis championships, Monday, Aug. 31, 2020, in New York. (AP Photo/Frank Franklin II)

Naomi Osaka, of Japan, wears a protective mask due to the COVID-19 virus outbreak, featuring the name "George Floyd", while arriving on court to face Shelby Rogers, of the United States, during the quarterfinal round of the US Open tennis championships, Tuesday, Sept. 8, 2020, in New York. (AP Photo/Frank Franklin II)