![Naomi Osaka of Japan hits a ball during the semifinal match against Elise MERTENS of Belgium in the Toray Pan Pacific Open tennis tournament at ITC Utsubo Tennis Center in Osaka on Naomi Osaka of Japan hits a ball during the semifinal match against Elise MERTENS of Belgium in the Toray Pan Pacific Open tennis tournament at ITC Utsubo Tennis Center in Osaka on](https://c8.alamy.com/comp/2NRYRGW/naomi-osaka-of-japan-hits-a-ball-during-the-semifinal-match-against-elise-mertens-of-belgium-in-the-toray-pan-pacific-open-tennis-tournament-at-itc-utsubo-tennis-center-in-osaka-on-september-21-2019-naomi-osaka-of-japan-won-the-match-to-advance-to-final-the-yomiuri-shimbun-via-ap-images-2NRYRGW.jpg)
Naomi Osaka of Japan hits a ball during the semifinal match against Elise MERTENS of Belgium in the Toray Pan Pacific Open tennis tournament at ITC Utsubo Tennis Center in Osaka on
![Elise Mertens, of Belgium, returns to Naomi Osaka, of Japan, during the Miami Open tennis tournament, Monday, March 29, 2021, in Miami Gardens, Fla. (AP Photo/Marta Lavandier Stock Photo - Alamy Elise Mertens, of Belgium, returns to Naomi Osaka, of Japan, during the Miami Open tennis tournament, Monday, March 29, 2021, in Miami Gardens, Fla. (AP Photo/Marta Lavandier Stock Photo - Alamy](https://l450v.alamy.com/450v/2mew8pr/elise-mertens-of-belgium-returns-to-naomi-osaka-of-japan-during-the-miami-open-tennis-tournament-monday-march-29-2021-in-miami-gardens-fla-ap-photomarta-lavandier-2mew8pr.jpg)
Elise Mertens, of Belgium, returns to Naomi Osaka, of Japan, during the Miami Open tennis tournament, Monday, March 29, 2021, in Miami Gardens, Fla. (AP Photo/Marta Lavandier Stock Photo - Alamy
![Justin Henin exclusive: Naomi Osaka is leader in women's tennis; does Serena Williams still have fire in her belly? | Tennis News | Sky Sports Justin Henin exclusive: Naomi Osaka is leader in women's tennis; does Serena Williams still have fire in her belly? | Tennis News | Sky Sports](https://e0.365dm.com/21/05/800x600/skysports-osaka-tennis_5394767.jpg?20210525125301)
Justin Henin exclusive: Naomi Osaka is leader in women's tennis; does Serena Williams still have fire in her belly? | Tennis News | Sky Sports
![A file photo shows Naomi Osaka hitting a ball during the semifinal match against Elise MERTENS of Belgium in the Toray Pan Pacific Open tennis tournament at ITC Utsubo Tennis Center in A file photo shows Naomi Osaka hitting a ball during the semifinal match against Elise MERTENS of Belgium in the Toray Pan Pacific Open tennis tournament at ITC Utsubo Tennis Center in](https://c8.alamy.com/comp/2NN7EXG/a-file-photo-shows-naomi-osaka-hitting-a-ball-during-the-semifinal-match-against-elise-mertens-of-belgium-in-the-toray-pan-pacific-open-tennis-tournament-at-itc-utsubo-tennis-center-in-osaka-on-september-21-2019-osaka-earned-her-first-right-to-appear-in-tokyo-olympics-with-the-announcement-of-the-international-tennis-rankings-used-to-give-qualification-for-the-olympics-on-june-14-2021-the-yomiuri-shimbun-via-ap-images-2NN7EXG.jpg)