Top seeds Aryna Sabalenka and Alexander Zverev were both eliminated from the Cincinnati Open on Wednesday, marking a significant upset day at the tournament.

Their departures came during the fourth round of the hardcourt event, which serves as a key tune-up for the upcoming US Open. The dual exits by the world number one and the French Open champion created considerable shockwaves in the tennis world.

The biggest surprise involved world number one Aryna Sabalenka, who was defeated by unseeded Czech player Sara Bejlek. Bejlek, ranked 35th in the world, secured a 7-6 (9/7), 6-4 victory in a match that concluded past midnight. Sabalenka had held leads in both the first-set tiebreaker and the second set but was ultimately overcome by Bejlek's resilience.

Bejlek expressed disbelief at her victory, stating it felt incredible and that she focused on playing by feel rather than succumbing to nerves. This marks her first win against a top-10 opponent and propels her into the quarterfinals, where she is scheduled to face Madison Keys. The loss is a notable setback for Sabalenka's US Open preparations, as she also experienced early exits in recent tournaments.

On the men's side, French Open champion Alexander Zverev lost to American Tommy Paul in a hard-fought match. Paul saved a match point before prevailing with a 4-6, 7-6 (8/6), 6-4 scoreline. The match experienced delays due to rain, adding to the drama.

Zverev had opportunities to close out the second set but faltered, and Paul capitalized in the decider. Paul noted that he became more aggressive and had fun during the match. This victory marks Paul's third win in their last four encounters.

Another notable casualty in the men's draw was second seed Felix Auger-Aliassime, who was defeated by American Frances Tiafoe. Auger-Aliassime's exit further reshapes the men's draw, with several top contenders now out of the running.

Paul's next opponent in the quarterfinals will be Flavio Cobolli, the runner-up at Roland Garros, who advanced after a lengthy match. The Cincinnati Open continues to deliver unexpected results as the tournament progresses towards its final stages.