She defeated world No.18 Kiki Bertens of Netherlands 6-3 6-1 in 55 minutes after Bertens made 31 unforced errors. Barty broke Berten’s serve fours times and never faced a break point.

“It was really tricky conditions…and we were both struggling a little,” Barty said.

“I’m very happy to come through and get a little bit better during the match,” she added.

The 22-year-old Australian has now won eight of her last nine matches on hard courts and leads the WTA in grass-court wins.

She faces world No.1 Simona Halep in the semifinal tomorrow morning AEST.

Halep had one of her best performances since the French Open, which she won, as she became the first player to reach 40 WTA wins this season.

It will be the first time the two players meet in their careers.