The fourth match of the day on the OWL Arena saw Alexander Bublik complete an upset over world No. 1 Jannik Sinner with a 3-6, 6-3, 6-4 win in a two-hour, two-minute thriller, advancing to the Terra Wortmann Open quarterfinals on Thursday in Halle.
In his on-court interview, he shared: “We are tennis players, and we try to win every match we play, but it is a special one. I had never beaten a No. 1 in the world. It is an accomplishment.”
The Italian favorite made a fast start to the first set, opening a 3-0 advantage to the delight of the fans in Halle.
Then, the 2023 champion found his rhythm behind his booming serve, dropping only one point in three service games.
Despite narrowing the gap, the world No. 43 would not be able to stop the top seed from claiming the opener 6-3 in just 26 minutes.
Under pressure, the 27-year-old fended off two break points before holding his ground in a lengthy opening game of the second set, setting the foundations for a commanding turnaround.
In his third attempt, the Kazakhstani player converted the break, battling through an intense sixth game and holding to love, inching ahead 5-2.
After Sinner served to stay in the match, the Kazakh got back in the driver’s seat; flawless on the return, he went the distance to even the contest one set apiece, hitting 20 winners in the process.
Into a decider, the talented four-time ATP titlist went toe-to-toe with Italy’s top racquet with authority.
He kicked up a level in the seventh game, finding the breathing room he needed to break his opponent at a crucial moment, extending his advantage to 5-3.
Displaying world-class tennis, Bublik notched a remarkable performance 6-4, winning 78 percent of the points on his first delivery while firing 36 winners against 25 unforced errors.
Assessing his performance, he added, “I kept serving. I tried to be clutch. I tried to get back whatever I [could]. He is an unbelievable player, and I was not thinking I could beat him. But I had a few chances and executed them well.
“I kept serving. I had better chances than at Roland-Garros; I stayed there, tried to return as much, and serve aces, so the ball didn’t come back, and it worked really well.”
Two weeks ago, Sinner beat him at the French Open quarterfinals, making it to the championship match, where he lost to world No. 2 Carlos Alcaraz in a memorable clash.
Next, the former world No. 17 will play seventh seed Tomas Machac, who dispatched Fabian Marozsan with a straightforward win in just 60 minutes.
Earlier, second seed Alexander Zverev showcased a rock-solid performance behind his serve - won 82 percent of the points on his first serve - to overpower a spirited Lorenzo Sonego 3-6, 6-4, 7-6(2), producing his 20th win at the venue.
The home favorite progressed to his sixth quarterfinal in Halle, clinically stepping up his level when it mattered most in a two-hour, 24-minute high-level contest.
The world number three will meet Hamburg champion Flavio Cobolli for the second time in his career, a first encounter on grass between the title contenders at the ATP 500 event.
Following a hard-fourth 7-6(2), 4-6, 7-6(5) triumph over Canadian Denis Shapovalov on the Schauinsland-Reisen Court, Cobolli secured his place in the last eight.
Earlier, world No. 63 Tomas Martin Etcheverry clinched his first Top 20 win on grass by stunning fourth seed Andrey Rublev 6-3, 6-7(4), 7-6(6), a grueling three-hour battle, which saw the Argentine player save two match points before notching the win.
A confidence boost result for the former world No. 27, who has been struggling this season to find his best tennis, achieving his maiden quarterfinal of a grass-court tournament for the first time in the build-up to the Wimbledon Championships.
On Friday, he will face off against eighth seed Karen Khachanov, who came out on top 6-3, 1-6, 6-3 in a rollercoaster of a match against Canadian Felix Auger-Aliassime.
The Moscow native leads the 25-year-old 1-0 in their series; nonetheless, they have never played one another before on the grass surface.
On Wednesday, American Alex Michelsen toppled Greece No.1 Stefanos Tsitsipas in straight sets, reaching his fourth career quarterfinal on grass.
“It was an incredibly close match,” he asserted courtside. “I’m glad that I was able to overcome my nervousness after losing my serve and continued to play courageously.”
The 20-year-old will square off against third seed Daniil Medvedev, who pocketed his 400th career match win by cruising past Frenchman Quentin Halys, 6-2, 7-5, imposing his game from the onset.
The 2022 Halle runner-up did not concede a lone break point in the match, punching his ticket into the last eight for the 13th time on the surface.