Serina Williams was disappointed with her performance in a three-set victory over 17-year-old Katie McNally in the second round. She seemed to bring this disappointment out of Caroline Muchova.
23-year-old Muchova, ranked 44th, remained close to the first six games. But serving at 3-3, Muchova struggles to score her first serve and Williams seeks to claim a break. In the next game, she earned a break point to take a 5-3 lead and then broke Muchova's love to take the set, 6-3.
Williams quickly won the first three games of the second set. She was beaten to make the score 2-3, but interrupted Muchova's serve in the next game. Williams lost just two more points the rest of the game and won, 6-3, 6-2.
In Other Matches For Women, No. 2 Ashley Barty Removed No. 30 Maria Sakkari, 7-5, 6-3; No. 3 Carolina Pliskova outscored Ons Jaber, 6-1, 4-6, 6-4; and No. 16 Johanna Conta defeated Zhang Shuai, 6-2, 6-3.
No. 5 Elina Svitolina and No. 10 Madison Keys also won to stage a blockbuster game for the fourth round on Sunday. Svitolina dominates her Ukrainian compatriot Diana Yastremska, 6-2, 6-0. Keys needed medical treatment during the game due to illness but lingered to defeat his colleague American Sofia Kenin, 6-3, 7-5.
Alex de Minaver upset Kee Nishikori
Alex de Minaver from Australia scored the biggest win of his career, beating No. 7 Kee Nishikori, 6-2, 6-4, 2-6, 6-3 at Grandstand.