US teen Coco Gauff upsets defending Australian Open champ Osaka
2:02am PST - January 24th, 2020 coco gauff - Al Jazeera EnglishFifteen-year-old Gauff defeats Japanese third seed Naomi Osaka 6-3,6-4 to advance into the fourth round in Melbourne.
Fifteen-year-old Gauff defeats Japanese third seed Naomi Osaka 6-3,6-4 to advance into the fourth round in Melbourne.