Naomi Osaka, of Japan, holds up the championship trophy while posing for photographs at the Billie Jean King National Tennis Center in New York.
Naomi Osaka, of Japan, returns a shot to Victoria Azarenka, of Belarus, during the women's singles final of the US Open tennis championships, in New York.
Naomi Osaka, of Japan, returns a shot to Victoria Azarenka, of Belarus, during the women's singles final of the US Open tennis championships, in New York.
Naomi Osaka, of Japan, reacts after defeating Victoria Azarenka, of Belarus, in the women's singles final of the US Open tennis championships, in New York.
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, in New York...
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, in New York...
Naomi Osaka, of Japan, right, poses for a photo with Victoria Azarenka, of Belarus, after winning the women's singles final of the US Open tennis championships, in New York.
Naomi Osaka, of Japan, left, greets Jennifer Brady, of the United States, at the net after winning their semifinal match of the US Open tennis championships, in New York.
Jennifer Brady, of the United States, serves to Naomi Osaka, of Japan, during a semifinal match of the US Open tennis championships, in New York.
Naomi Osaka, of Japan, reacts after defeating Jennifer Brady, of the United States, in a semifinal match of the US Open tennis championships, in New York.
Naomi Osaka, of Japan, plays Shelby Rogers, of the United States, during the quarterfinal round of the US Open tennis championships, in New York.
Naomi Osaka, of Japan, fires a ball into the stands after defeating Shelby Rogers, of the United States, during the quarterfinal round of the US Open tennis championships, in New Y...
Naomi Osaka, of Japan, celebrates after winning a match against Anett Kontaveit, of Estonia, during the fourth round of the US Open tennis championships, in New York.
Naomi Osaka, of Japan, returns a shot to Marta Kostyuk, of the Ukraine, during the third round of the US Open tennis championships, in New York.
Naomi Osaka, of Japan, right, taps rackets with Camila Giorgi, of Italy, after winning the match during the second round of the U.S. Open tennis championships, in New York.
Naomi Osaka, of Japan, above, greets Misaki Doi, of Japan, at the net after defeating her during the first round of the US Open tennis championships in New York.
Naomi Osaka, of Japan, serves to Misaki Doi, of Japan, during the first round of the US Open tennis championships in New York.
Naomi Osaka, of Japan, returns a shot from Elise Mertens, of Belgium, during the semifinals at the Western & Southern Open tennis tournament in New York.
Naomi Osaka, of Japan, returns a shot to Anett Kontaveit, of Estonia, during the quarterfinals at the Western & Southern Open tennis tournament in New York.
Naomi Osaka, of Japan, right, takes a selfie with a fan after winning her match with Karolina Muchova, of the Czech Republic, during the second round at the Western & Southern Open...
