Australian Open 2021: Hsieh Su-Wei becomes oldest first-time quarterfinalist in Grand Slam

In Australian Open Tennis, 35-year-old Hsieh Su-Wei has become the oldest first-time quarterfinalist in a Grand Slam. Taiwanese Hsieh Su-wei stunned 19th seed Czech Marketa Vondrousova 6-4, 6-2 in straight sets today. In other women's singles, Grand Slam champions Naomi Osaka beat 14th seeded Garbine Muguruza,  6-4, 4-6, 7-5 on Rod Laver Arena today.