NEW YORK, NY, USA - No.3 seeds Andrea Sestini-Hlavackova and Barbora Strycova continued their progress at the US Open, defeating Han Xinyun and Raluca Olaru 6-1, 7-6(5) to move into the third round.

“I’m really pleased that we finished in two sets,” Sestini-Hlavackova said afterwards. “We had a little hiccup at the end of the second set, and I’m really happy that even with that wrong momentum we were able to close it.”

After starting out the first set on a tear - trading breaks with Olaru and Xinyun before reeling off four games in a row to comfortably close it out - the No.3 seeded Czechs struggled to serve out the match in the second.

Han and Olaru recovered from an early break to level the score at 5-5, breaking Sestini-Hlavackova and Strycova as they served for the match. But the Czechs rallied in the tiebreaker, where they turned around a 1-4 deficit and claimed the last six of seven points to take the match in straight sets.

“It’s really hard to know what to expect against new teams and teams we haven’t played, and so you kind of learn it as you go on the court,” Strycova explained. “The teams don’t repeat themselves that often, so it’s always a new challenge. [As the No.3 seeds] we are maybe more seen and more known.

“You see a lot of top teams dropping in the early rounds here and maybe that’s the reason why. Because the new teams are just unpredictable.”

In other doubles news, the No.6 seeds Ekaterina Makarova and Lucie Hradecka had to come back a set down to see off Shuko Aoyama and Duan Ying-Ying, 3-6, 6-4, 7-5, while No.13 seeds Ashleigh Barty and CoCo Vandeweghe knocked out a fellow American-Australian duo Monique Adamczak and Desirae Krawczyk 6-2, 7-5.

Sam Stosur and Zhang Shuai scored the upset of the day against the No.4 seeds Gabriela Dabrowski and Xu Yifan to win 6-2, 7-5, while Elise Mertens and Demi Schuurs, the No.7 seeds, edged through a tough opening set before cruising in the second against Vitalia Diatchenko and Margarita Gasparyan 6-4, 6-0. Timea Bacsinszky and Vera Zvonareva edged past Naomi Broady and Danielle Collins 6-2, 7-5 en route to the third round.

No.14 seeds Raquel Atawo and Anna-Lena Groenefeld advanced over Victoria Azarenka and Chan Yung-Jan (Latisha), after Chan was forced to retire due to dizziness in the first set, 4-1.