QUIANG Wang conquers No. 2 seed Ashleigh Barty to extend her best Slam run. AFP

NEW YORK (AFP) — Serena Williams overcame an injury scare to maintain her pursuit of a record-tying 24th Grand Slam singles title at the US Open on Sunday while Roland Garros champion Ashleigh Barty and Karolina Pliskova crashed out in the last 16.

Williams, a six-time US Open winner, romped to a 6-3, 6-4 victory over Croatian 22nd seed Petra Martic to set up a quarterfinal with China’s Wang Qiang, the conqueror of world number two Barty.

The 37-year-old American star required a medical timeout in the second set after rolling her right ankle as she approached the net but promptly recovered to reach the last eight in New York for the 16th time.

“I feel fine right now physically,” said Williams, who received further strapping to an already heavily taped ankle.

“But I’ll see tomorrow. So far I’m good. I have been managing it. We’ll see tomorrow.

Eighth-seeded Williams, who has also suffered knee and back injuries this season, felt a mental setback when it happened but battled through to win.

“I’ve had a rough year with injuries,” she said. “It was like, ‘Oh my God. Not again. I’m finally walking.’”

Williams, who last won a major at the 2017 Australian Open and hasn’t won the US Open since 2014, is seeking a 24th career Slam title to match Margaret Court’s all-time record.

She will play 18th seed Wang for the first time as the Chinese 27-year-old extended her best Slam run with a 6-2, 6-4 defeat of an erratic Barty.

The Australian, who beat Wang twice last year in their only prior meetings, was undone by 39 unforced errors at Louis Armstrong Stadium.