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Naomi Osaka

Naomi Osaka, of Japan, holds up the championship trophy while posing for photographs at the Billie Jean King National Tennis Center in New York.

Photo by AP/PTI

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.

AP Photo/Seth Wenig

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.

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, 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, in New York.

AP Photo/Frank Franklin II

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.

AP Photo/Seth Wenig

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.

AP/PTI Photo

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.

AP Photo/Seth Wenig

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.

AP Photo/Frank Franklin II

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.

AP Photo/Frank Franklin II

Naomi Osaka, of Japan, plays Shelby Rogers, of the United States, during the quarterfinal round of the US Open tennis championships, in New York.

AP Photo/Frank Franklin II

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 York.

AP Photo/Frank Franklin II

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.

AP Photo/Frank Franklin II

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.

AP Photo/Seth Wenig

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.

AP Photo/Frank Franklin II

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.

AP Photo/Frank Franklin II

Naomi Osaka, of Japan, serves to Misaki Doi, of Japan, during the first round of the US Open tennis championships in New York.

AP Photo/Frank Franklin II

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.

AP/PTI

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.

AP/PTI

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 tennis tournament in New York.

Photo by AP/PTI

Japan's Naomi Osaka celebrates after defeating Marie Bouzkova of the Czech Republic in their first round singles match the Australian Open tennis championship in Melbourne, Australia.

Photo by AP/PTI

Japan's Naomi Osaka serves during a practice session ahead of the Australian Open tennis championship in Melbourne, Australia

Photo by AP/PTI

Defending woman's singles champion Japan's Noami Osaka holds the Daphne Ackhurst Cup following the official draw ceremony on Margaret Court Arena ahead of the Australian Open tennis championship in Melbourne, Australia.

AP/PTI Photo

From left, Roger Federer of Switzerland, Nick Kyrgios of Australia, Naomi Osaka of Japan, Alexander Zverev, Dominic Thiem of Austria, Serena Williams of the United States, Caroline Wozniacki of Denmark, Petra Kvitova of the Czech Republic, Coco Gauff of the United States, Novak Djokovic of Serbia, Stefanos Tsitsipas of Greece and Rafael Nadal of Spain pose for a photo during the Rally For Relief at Rod Laver Arena in Melbourne. Tennis stars have come together for the Rally for Relief to raise money in aid of the bushfire relief efforts across Australia.

AP/PTI

Naomi Osaka of Japan plays a shot during her match against Maria Sakkari of Greece at the Brisbane International tennis tournament in Brisbane, Australia.

AP/PTI

Naomi Osaka of Japan, left, and Ashleigh Barty of Australia pose with their trophies after the final of the women's singles final at the China Open tennis tournament in Beijing. Osaka defeated defeating Barty 3-6, 6-3, 6-2.

Photo by AP/PTI

Naomi Osaka of Japan kisses her winner's trophy after defeating Ashleigh Barty of Australia in the women's final at the China Open tennis tournament in Beijing

Photo by AP/PTI

Naomi Osaka of Japan reacts while competing against Jessica Pegula of the United States during their match in the China Open tennis tournament in Beijing

AP Photo/Mark Schiefelbein

Naomi Osaka of Japan reacts while competing against Jessica Pegula of the United States during their match in the China Open tennis tournament in Beijing

Photo by AP/PTI

Japan's Naomi Osaka poses for a photo during an award ceremony after winning the Toray Pan Pacific Open tennis tournament in Osaka, western Japan. Osaka won her first singles title since the Australian Open in January by beating Russia's Anastasia Pavlyuchenkova 6-2, 6-3 in the Toray Pan Pacific final.

Photo by AP/PTI

In women's singles, Belinda Bencic beat defending champion Naomi Osaka 7-5, 6-4.

AP

Coco Gauff wipes away tears while talking to Naomi Osaka, of Japan, after Osaka defeated Gauff during the third round of the U.S. Open tennis tournament in New York.

Photo by AP/PTI

World No. 1 Naomi Osaka, 21, won 6-3, 6-0 against Coco Gauff.

AP

Naomi Osaka is yet to play her second round match, where she will face Magda Linette.

Naomi Osaka, of Japan, returns a shot to Anna Blinkova, of Russia, during the first round of the US Open tennis tournament in New York.

AP/PTI

Japan's Naomi Osaka screams after scoring a point against Victoria Azarenka of Belarus during their second round match of the French Open tennis tournament at the Roland Garros stadium in Paris.

AP Photo/Jean-Francois Badias

Japan's Naomi Osaka returns the ball to Mihaela Buzarnescu of Romania at the Italian Open tennis tournament, in Rome.

AP/PTI

Japan's world number one, Naomi Osaka follows her ball in a match against Kristina Mladenovic of France during a match of the Dubai Duty Free Tennis Championship, in Dubai, United Arab Emirates.

AP/PTI Photo

Well, there’s a fistful of firsts for this atta girl with a killer tan that perhaps is an inherited pigment from her American father of Haitian ancestry. Naomi Osaka, the first from Japan, and Asia, to rank No. 1 in women’s tennis, is the youngest to climb that global totem pole at 21.

Photograph by Getty Images

Japan's Naomi Osaka celebrates after defeating Karolina Pliskova of the Czech Republic in their semifinal at the Australian Open tennis championships in Melbourne, Australia.

AP/PTI

Japan's Naomi Osaka serves during a practice session ahead of the Australian Open tennis championships in Melbourne, Australia.

AP/PTI

Naomi Osaka of Japan plays a shot during her semifinal match against Lesia Tsurenko of Ukraine at the Brisbane International tennis tournament in Brisbane, Australia.

AP Photo/Tertius Pickard

Destanee Aiava of Australia plays a shot during her match against Naomi Osaka of Japan at the Brisbane International tennis tournament in Brisbane, Australia.

AP Photo/Tertius Pickard

U.S. Open Champion Naomi Osaka of Japan reacts, holding a 274 cm (9ft) long olive python at Lone Pine Koala Sanctuary in Brisbane. Osaka is in Brisbane to play in the Brisbane International tennis tournament which starts on Sunday.

Darren England/AAP Image via AP