Sabalenka looks to march on at US Open with top ranking in the bag

NEW YORK : Aryna Sabalenka will have a spring in her step when she meets Daria Kasatkina in the U.S. Open fourth round on Monday, with the Belarusian set to take over as world number one.

The second seed reached the semi-finals in the previous two Grand Slams after her Australian Open triumph and will now leapfrog Iga Swiatek when the latest rankings are released on Sept. 11 after the New York champion's shock exit on Sunday.

Swiatek fell 3-6 6-3 6-1 to former French Open champion Jelena Ostapenko and Sabalenka - who has a 20-2 record at the majors this year - will aim to push on after accomplishing another of her main objectives for the season.

"Reaching the WTA world number one singles ranking is something I've dreamed of ever since I was a little girl when I started playing tennis," Sabalenka, 25, said.

"It's an unbelievable feeling to join the amazing list of other WTA players to achieve this and it's a huge honour to be able to call myself the number one."

While Sabalenka will headline the evening session at Arthur Ashe Stadium, reigning men's champion Carlos Alcaraz will face unseeded Italian Matteo Arnaldi in the afternoon as the 20-year-old steps up his bid for a third Grand Slam crown.

"I think I'm playing at a good level," Alcaraz said. "I'm feeling really well on court, really comfortable. I always say that I can be better, but right now I'm really happy with the level that I'm playing."

Alcaraz takes centre stage after local favourites Madison Keys and Jessica Pegula clash in the opening match of the day on the main showcourt, while German Alexander Zverev meets Italian Jannik Sinner to bring the curtain down on the eighth day.

Over at Louis Armstrong Stadium, American Peyton Stearns will hope to keep her dream run