RIYADH, Saudi Arabia (AFP) — Elena Rybakina clinched her biggest title since Wimbledon in 2022 by defeating world No. 1 Aryna Sabalenka 6-3, 7-6 (7/0) at the WTA Finals in Riyadh on Saturday.

The world No. 6 put on yet another serving masterclass and was at her returning best as she became the first Kazakh and the first player representing an Asian country to lift the WTA Finals singles trophy.

Having gone 3-0 in round-robin play, Rybakina earned a record $5.235 million and will finish the year ranked number five in the world.

"It's been an incredible week, I honestly didn't expect any result, and to go so far, it's just incredible," said Rybakina, who battled a shoulder injury all week.

The ace leader on tour with 516 strikes this season, Rybakina fired 13 against Sabalenka on Saturday, and finished the week with a total of 48 in Riyadh.

Rybakina was the last of the eight players in the singles field to qualify for the WTA Finals in Riyadh, and she did it by winning the 500-level title in Ningbo and reaching the semi-finals in Tokyo before withdrawing from the tournament.

Her winning streak now stands at 11 matches and she improved her head-to-head record against Sabalenka to 6-8.

After the match, Rybakina refused to pose for a photo alongside Sabalenka and WTA CEO Portia Archer.

Rybakina has been at odds with the tour ever since they suspended her coach Stefano Vukov in February, for breaking the WTA code of conduct.

Vukov was initially suspended for a year but appealed the decision and was back in Rybakina's corner in August.

Asked why she snubbed the ceremonial photo with Archer, Rybakina said she preferred to keep the reason between her and the WTA chief.

On whether she has had reconciliation talks with the tour to move past their issues, Rybakina said: "I think we're all doing our job and we had the opportunity to have conversations but in the end it never happened so we're all doing our job and I think we're going to keep it this way."

Squaring off for the 14th time, Sabalenka and Rybakina form one of the most gripping rivalries of the WTA, dating back to 2019.

Rybakina entered the final carrying a 10-match winning streak. The last player to beat her was Sabalenka, who knocked out the Kazakh in the Wuhan quarterfinals four weeks ago. 

Both players brought their A-game from the start, showcasing their signature brand of boom-boom tennis to stay neck and neck through the first five games.

It was Rybakina's defense, though, that paid off in the sixth game, her desperate lob drawing the error from Sabalenka, who netted the overhead to get broken.

That one break was all Rybakina needed to secure the opening set in 44 minutes.

Rybakina was untouchable on serve in the second set, dropping just two points on serve through four service games.

Sabalenka was more vulnerable in that department, feeling the pressure on her own serve but still finding ways to save four breakpoints, including two crucial ones at 4-4.

Against the momentum, Sabalenka suddenly got her hands on two set points on Rybakina's serve in game 10 but the Kazakh stood her ground to level for 5-5.

The set fittingly went to a tiebreak, and despite her remarkable 22-2 tiebreak record for the season, Sabalenka couldn't halt Rybakina, who sealed the deal after one hour and 47 minutes of play.