It was a day of excessive warmth and heavy serving in Cincinnati as Carlos Alcaraz returned to motion for the primary time since Wimbledon, surviving a three-set scare towards Damir Dzumhur.
Daniil Medvedev wasn’t as lucky, blown away within the warmth by World No. 85 Adam Walton, who scored the largest win of his profession.
American firepower was as soon as once more on full show, with Ben Shelton, Reilly Opelka, Jenson Brooksby and Brandon Nakashima all reserving their spots within the final 32. Opelka’s win was significantly notable, snapping a five-match dropping streak to Alex de Minaur with a booming 14-ace efficiency.
Alexander Zverev and Karen Khachanov additionally progressed with straight-set wins, whereas Roberto Bautista Agut quietly moved previous Cameron Norrie in one of many day’s cleaner performances.
Day 5 now brings the third-round clashes, with Sinner, Fritz, Tiafoe, and Rune all set to headline.
Day 4 Cincinnati Open 2025 Spherical of 64 Outcomes
Winner
Loser
Scoreline
Ben Shelton (5)
Camilo Ugo Carabelli
6-3 3-1 RET
Roberto Bautista Agut
Cameron Norrie (32)
6-4 6-3
Jiri Lehecka (22)
Tristan Boyer (WC)
4-6 6-1 6-4
Adam Walton
Daniil Medvedev (12)
6-7(0) 6-4 6-1
Karen Khachanov (14)
Valentin Royer
6-4 7-6(6)
Jenson Brooksby (WC)
Arthur Cazaux (LL)
7-5 6-1
Brandon Nakashima (27)
Alexander Blockx (Q)
4-6 6-3 7-6(5)
Alexander Zverev (3)
Nishesh Basavareddy (WC)
6-3 6-3
Reilly Opelka
Alex de Minaur (6)
7-6(6) 6-4
Francisco Comesana
Luciano Darderi (29)
6-4 3-1 RET
Alexei Popyrin (21)
Martin Landaluce (Q)
7-6(3) 6-3
Andrey Rublev (9)
Learner Tien
76(4) 6-3
Jakub Mensik (16)
Ethan Quinn
6-4 6-2
Luca Nardi (LL)
Denis Shapovalov (24)
6-7(5) 6-3 6-4
Hamad Medjedovic
Tallon Griekspoor (26)
6-4 7-6(3)
Damir Dzhumur
Carlos Alcaraz (2)
6-1 2-6 6-3
Key Matches

Carlos Alcaraz def. Damir Dzumhur, 6-1, 2-6, 6-3
Carlos Alcaraz survived one other topsy-turvy battle towards World No. 56 Damir Dzumhur, prevailing 6-1, 2-6, 6-3 to achieve the Cincinnati Open third spherical.
Enjoying his first match since Wimbledon, Alcaraz raced by way of the primary set in 28 minutes however unravelled within the second, committing 44 unforced errors and failing to avoid wasting any of the three break factors.
Dzhumur gave Alcaraz an actual robust time within the French Open third spherical earlier this yr, and whereas I didn’t suppose he would be capable to replicate that right here, his net-charging techniques disrupted Alcaraz’s rhythm earlier than the Spaniard discovered extra of a footing within the third to recover from the road.
Alcaraz faces Hamad Medjedovic subsequent after the Serb took out Tallon Griekspoor.
Ben Shelton def. Camilo Ugo Carabelli, 6-3, 3-1 (Ret.)
Ben Shelton stored up his hard-court run as Camilo Ugo Carabelli retired at 6-3, 3-1 on account of a knee harm, simply three days after Shelton’s Toronto Masters 1000 title.
As anticipated, Shelton’s serve-dominated first set noticed him win 80% of first-serve factors, earlier than Carabelli’s knee drawback led to a medical timeout and retirement.
Shelton has jumped up the rankings in latest weeks and is in an ideal place to make the ATP Finals in Turin. He faces Spanish veteran Roberto Bautista Agut subsequent.
Karen Khachanov def. Valentin Royer, 6-4, 7-6(5)
Karen Khachanov kicked off his Cincinnati marketing campaign with a 6-4, 7-6(5) win over French qualifier Valentin Royer, advancing to the third spherical in a single hour and 50 minutes.
Khachanov performed plenty of tennis throughout his run to the Toronto ultimate, however he hit the bottom working in Cincy, firing seven aces and leaning on his forehand to dominate key moments.
Alexander Zverev def. Nishesh Basavareddy, 6-3, 6-3
Alexander Zverev delivered a serving masterclass, crushing Nishesh Basavareddy 6-3, 6-3 in 66 minutes.
The World No. 3 landed 82% of first serves, fired 12 aces, and confronted no break factors. When Sascha has an excellent serving day, he’s extraordinarily tough to beat, and the cooler evening situations labored in his favour right here.
Adam Walton def. Daniil Medvedev, 6-7(0), 6-4, 6-1
Adam Walton pulled off the upset, toppling fifth seed Daniil Medvedev 6-7(0), 6-4, 6-1 in a two-and-a-half-hour battle.
The World No. 85, with simply three tour-level wins coming into 2025, outlasted Medvedev’s 41 winners (together with 18 aces) as the previous champion light within the Ohio warmth.
Medvedev, who received the first-set tiebreak with out dropping a degree, collapsed within the third, successful only one recreation as he struggled to deal with the situations.
Reilly Opelka def. Alex de Minaur, 7-6(6), 6-4
Alex de Minaur’s Cincinnati Open marketing campaign ended abruptly as he fell to Reilly Opelka 7-6(6), 6-4 in a one-hour, 41-minute upset.
The sixth seed, who has had 24 hard-court wins in 2025, was outpowered by the American, who snapped a 0-5 head-to-head dropping streak.
Opelka fired 14 aces and 38 winners, saving all seven break factors confronted, whereas De Minaur’s serve faltered at key moments.
Highlights
Cincinnati Open 2025 Day 5 Spherical of 32 Matches
Jannik Sinner (1) vs Gabriel Diallo (30)
Adrian Mannarino (Q) vs Tommy Paul (13)
Arthur Rinderknech vs Felix Auger-Aliassime (23)
Stefanos Tsitsipas (25) vs Benjamin Bonzi
Taylor Fritz (4) vs Lorenzo Sonego (31)
João Fonseca vs Terence Atman (Q)
Frances Tiafoe (10) vs Ugo Humbert (20)
Alex Michelsen (28) vs Holger Rune (7)