Al Jazeera English reported that Naomi Osaka lost to Mia Pohankova 6-3, 7-5 at an event in Tokyo. Pohankova is an 18-year-old from Slovakia and is ranked 144th in the world, the outlet reported. It said Osaka is a four-time Grand Slam champion. Osaka said she will return stronger after the defeat, according to Al Jazeera English. The outlet described the defeat as her latest low.