Sara Bejlek Stuns World No. 1 Aryna Sabalenka in Cincinnati Masters

World number one Aryna Sabalenka suffered another early exit ahead of the US Open after Czech 35th-ranked Sara Bejlek produced the biggest win of her career at the Cincinnati Masters.

The 20-year-old Bejlek defeated the top seed 7-6 (9-7), 6-4 in the fourth round on Wednesday night, reaching her first WTA 1000 quarter-final. The match ended shortly after midnight as Bejlek’s movement and consistency repeatedly frustrated Sabalenka.

Sabalenka appeared in control during the opening set after taking a break lead. She then moved ahead 5-1 in the tiebreak, putting herself within striking distance of taking the set.

Bejlek refused to surrender, winning the next points and eventually taking the tiebreak 9-7 after a dramatic comeback. The Czech then carried that momentum into the second set.

She broke Sabalenka’s serve three times and secured the victory with a love service game, finishing with an ace.

“I lost my words — it feels incredible,” Bejlek said after recording her first victory over a top-10 opponent and completing a major upset against the world number one.

The result sends Bejlek into the Cincinnati quarter-finals, where she will face American Madison Keys. The achievement is another major step for the Czech player, who won the Abu Dhabi hard-court title in February after entering the tournament as a qualifier.

For Sabalenka, the defeat extends a difficult period heading into the final Grand Slam tournament of the season. The four-time Grand Slam champion was eliminated in the fourth round in Toronto last week, after reaching the same stage at Wimbledon and the quarter-finals at the French Open.

Her latest loss could also have consequences for the top of the rankings. With Sabalenka eliminated in Cincinnati, world number two Elena Rybakina has an opportunity to challenge for the top position if she progresses deep enough in the tournament.

Bejlek’s victory continues a strong run in Cincinnati and provides her with a major boost before the US Open begins on August 30.

For Sabalenka, the result leaves little time to recover and regroup before the New York Grand Slam. After several recent exits earlier than expected, the Belarusian will now turn her attention to rebuilding her form before the final major of the season.

The Cincinnati result also underlines the growing depth of women’s tennis, with a player ranked outside the top 30 defeating the world’s number one after recovering from a significant deficit in the opening-set tiebreak.