Naomi Osaka headlined the stars in action as the second round of the women's singles tournament got underway at the 2021 Summer Olympics in Tokyo.
Top-seeded Ash Barty already crashed out in the first round, with No. 11 Jennifer Brady and No. 12 Elise Mertens also coming up short in their opening match.
Osaka, Garbine Muguruza and Aryna Sabalenka couldn't afford to take their opponents lightly Monday.
Women's Singles Results—July 26
No. 2 Naomi Osaka def. Viktorija Golubic 6-3, 6-2
No. 7 Garbine Muguruza def. Wang Qiang 6-3, 6-0
No. 8 Barbora Krejcikova def.