The 25-year-old from Belarus has never gone on to play in the New York final.

Sabalenka will now face 2017 runner-up Madison Keys after the American beat Wimbledon champion Marketa Vondrousova 6-1 6-4.

"I think I definitely played great tennis today and I'm super happy to win, she has played great tennis at the US Open," said Sabalenka, whose previous semi-final defeats came against Canada's Leylah Fernandez and Poland's Iga Swiatek.

"Now I have the opportunity to do better in the semis.

"I have learned [since the previous semi-finals] that I am ready to play these rallies and stay in the game and the point now. "I also focused on my physical abilities and am getting less tired on court. I am ready to play wherever I need to play now."

Confident Sabalenka underlines title credentials

Sabalenka was considered the pre-tournament favourite alongside defending champion Swiatek at the final Grand Slam event of the season, by virtue of her superb form throughout the year and previous pedigree on the US Open hard courts.

Top seed Swiatek being ousted in the last 16 by Latvia's Jelena Ostapenko offered further belief for those backing Sabalenka that she can go on to win her second major title.

The Australian Open champion has reached the semi-finals of all four majors in 2023, becoming the first woman since Serena Williams in 2016 to achieve the feat.

While American sixth seed Coco Gauff is looking formidable in the other side of the draw, the manner of Sabalenka's victory over Zheng provided more evidence of her credentials.

Sabalenka had not dropped a set coming into the quarter-final, losing just 16 games in her previous four matches.

The way she dominated 20-year-old Zheng from the start illustrated her confidence, winning the first seven points to lay the platform for an early break.

Sabalenka allowed her opponent to win just four points as she raced 5-0 ahead, going on to wrap up the first set in 27 minutes.

Zheng is one of the hottest prospects on the WTA Tour and eventually settled in what was her first major quarter-final.

The second set was a much closer contest, with a single break for Sabalenka in the sixth game proving decisive.

After Zheng saved a match point on her own serve, Sabalenka took a second in the following game when Zheng hit a backhand into the net, securing victory in just one hour and 13 minutes.

Keys eyes second Flushing Meadows final

Madison Keys has reached the US Open semi-finals three times

Sabalenka will face 17th seed Keys, who made relatively light work of Czech Vondrousova on a humid evening in New York.

The American has consistently impressed over the past few months, making back-to-back Grand Slam quarter-finals before going a step further at her home major.

Keys started the stronger of the two, breaking ninth seed Vondrousova at the first opportunity and racing to a 5-0 lead before serving out the set.

The second set was a closer affair but Keys played better in the big moments, saving all nine of the break points she faced and dominating with her huge forehand.

She will face a tough task against Sabalenka, who beat her at Wimbledon, but Keys said she would "buckle up and get as many balls back as I can".

"Just having played her at Wimbledon, she's obviously been amazing this year," Keys added.

"It's almost a completely different match and it's going to be a lot of hard hitting and not a lot of long points."