Mia Pohankova Stuns Naomi Osaka in Tokyo, Clinches Career-Best Win - Tokyo: Rising tennis star Mia Pohankova has delivered the biggest upset of her career, defeating former champion Naomi Osaka ... Get Latest News on Other Sports only on lokmattimes.com. The Slovakian, ranked 144th in the world, triumphed over Osaka in a compelling match that lasted one hour and 35 minutes, securing her spot in the quarterfinals.