In the battle of the players with a wild card, the Aussie veteran Samantha Stosur defeated Zhaoxuan Yang 7-5, 2-6, 6-2 in two hours and seven minutes. Samantha won two points more than her rival, suffering five breaks and earning six from 15 chances to move over the top after a dominant display in the decider.
Zhaoxuan made the best possible start, racing into a 4-1 lead with breaks in games three and five before Stosur rattled off four straight games to move in front, wasting four set points on the return in game ten before closing the opener with a late break at 6-5.
The Chinese was the better player in set number two, delivering breaks in games one and seven and sealing it with a hold at 15 in game eight, setting up a decider where she broke back at 1-3 to stay in contention. Still, Samantha was too good in the rest of the clash, taking the final three games to seal the deal and move into the last 16 with her 20th victory in 2019.
The 6th seed Yulia Putintseva took down Astra Sharma 6-1, 1-6, 7-5 in just under two hours, repelling six out of ten break points and seizing all five opportunities on the return to advance into the next round. Yulia had the upper hand on both serve and return in the opening set before fading from the court in set number two, allowing Sharma to impose her shots and force a decider where the Aussie opened a 4-0 lead.
Putintseva pulled one break back and saved a match point in the ninth game to gain the momentum, taking charge and breaking Sharma in games ten and 12 to complete a comeback and cross the finish line first. The 4th seed Caroline Garcia ousted the young Russian Anastasia Potapova 2-6, 6-2, 6-2 in an hour and 54 minutes, controlling the pace in sets two and three after a slow start and winning nine straight games from 2-1 down in set number two that carried her over the finish line.
Yafan Wang made a strong start, toppling Lauren Davis 6-0, 6-4 in 70 minutes after an excellent performance on both serve and return. The Chinese lost only 12 points in her games and grabbed five breaks, serving a bagel in the opener and erasing a 3-1 deficit in the second to find herself in the next round.
Rebecca Peterson sent out Venus Williams thanks to a 6-3, 4-6, 6-3 victory in two hours and two minutes, getting broken six times and erasing that deficit with eight breaks from 17 opportunities on the return, coming back from a break down in the decider to steal Venus' serve thrice and stay on the title course.