NEW YORK, Aug 30, 2025 (BSS/AFP) - World number one Aryna Sabalenka advanced to the fourth round of the US Open on Friday after extending her remarkable streak of tie-break victories to defeat Canada's Leylah Fernandez.

Reigning champion Sabalenka punched her ticket to the last 16 after seeing off Fernandez 6-3, 7-6 (7/2) in one hour 39 minutes on the Louis Armstrong Stadium.

Sabalenka's decisive second set victory was capped by her 18th consecutive tie-break win.

The victory was also sweet revenge for Sabalenka, who suffered an upset defeat to then teenager Fernandez in the semi-finals of the 2021 US Open.

"I wanted this revenge badly," Sabalenka said afterwards. "It was a tough lesson for me back then. Since then, we never played again.

"I just wanted to prove to myself that the lesson was learned and that I developed as a player and I could get this win."

Sabalenka attributes her dominance of tie-breaks this season to a tougher mental approach.

"I definitely think that mentally I'm pretty strong, and I'm still growing, because I'm learning a lot of lessons, and all of those lessons making me tougher, tougher, and tougher," she said.

Asked if she believed her opponents were aware of her tie-break record, she replied: "I hope so. I'm not focusing on that during the match, obviously. But extra pressure on my opponents? I love that."

The skilful Fernandez, the 31st seed, had started brightly, earning four break points on Sabalenka's opening service game of the first set.

Crucially though Sabalenka saved them all before holding, and then took advantage in the fourth game when Fernandez double-faulted to hand the Belarusian a break for a 3-1 lead.

That break was all Sabalenka needed to close out the set.

A tense second set saw Fernandez continue to cause problems for Sabalenka, who again was forced to fight off a break point in the sixth game.

But when the set went to a decisive tie-break, there only ever looked like being one winner, with Sabalenka scoring three mini-breaks in rapid succession to help open up a 4-1 lead.

That soon became 6-1 and Sabalenka sealed a win that sees her into a fourth round showdown with unseeded Spaniard Cristina Bucsa.