(FILES) In this file photo taken on January 26, 2019, Japan's Naomi Osaka reacts after a point against Czech Republic's Petra Kvitova during the women's singles final on day 13 of the Australian Open tennis tournament in Melbourne. - World number one Naomi Osaka has split from her coach Sascha Bajin just weeks after winning the Australian Open to complete back-to-back grand slam victories, the Japanese player said on February 11. (Photo by Jewel SAMAD / AFP)
(FILES) In this file photo taken on January 26, 2019, Japan's Naomi Osaka reacts after a point against Czech Republic's Petra Kvitova during the women's singles final on day 13 of the Australian Open tennis tournament in Melbourne. - World number one Naomi Osaka has split from her coach Sascha Bajin just weeks after winning the Australian Open to complete back-to-back grand slam victories, the Japanese player said on February 11. (Photo by Jewel SAMAD / AFP)
(FILES) In this file photo taken on January 26, 2019, Japan’s Naomi Osaka reacts after a point against Czech Republic’s Petra Kvitova during the women’s singles final on day 13 of the Australian Open tennis tournament in Melbourne. – World number one Naomi Osaka has split from her coach Sascha Bajin just weeks after winning the Australian Open to complete back-to-back grand slam victories, the Japanese player said on February 11. (Photo by Jewel SAMAD / AFP)Japan’s Naomi Osaka remained atop of WTA rankings released Monday, ahead of Czech Petra Kvitova and Romanian Simona Halep.
The largely unchanged top 20 saw Belgian Elise Mertens drop two places to 20th after being knocked out of the first round of the Madrid Open on Sunday by Slovakia’s Anna Karolina Schmiedlova, 103rd in the world.