British No. 1 Katie Boulter's grand slam season ended in comprehensive defeat on September 2, 2026, when she lost 6-1, 6-0 to seventh seed Karolina Muchova in the US Open second round. The match lasted just 58 minutes at Louis Armstrong Stadium after heavy rain forced a court relocation from an outer court. Boulter has now extended her losing streak to five consecutive matches, with just two wins across all four grand slam tournaments this year.
The relocation to the 14,000-capacity Louis Armstrong Stadium proved consequential for Boulter's performance. She struggled visibly with the conditions and environment, later describing the experience as "a bad day at the office – times two." Boulter acknowledged that the roof, noise levels, and overall atmosphere distracted her from her usual focus. "I struggled with the conditions. I struggled with the roof, the noise, I let things distract me," she said. "I let it get to me. I'm not usually aware of everything going on. It made me feel a little bit uncomfortable. I have to deal with it better."
Her serve proved particularly problematic, with eight double faults and no aces recorded throughout the match. Boulter won just 33% of points behind her first serve and was unable to defend any of the seven break points she faced. She compiled 22 unforced errors against just four winners, a stark contrast to Muchova's 14 winners and nine unforced errors. Former world No. 5 Daniela Hantuchova suggested Boulter requires significant changes to her approach. "I would be really humbled, I would sit down with my team and say 'OK, we need to change something big time'," Hantuchova told a national broadcaster. "First of all, it was very obvious today that it was the serve. I feel like it needs to be cleared up because she was losing the rhythm and not using her legs. That's the number one thing. If I am Boulter, I would be on the practice court tomorrow."
Boulter's form has deteriorated sharply since early summer. After winning her fourth WTA title in Ostrava and defeating world No. 2 Elena Rybakina at Queen's to climb back into the top 60, she suffered a first-round exit at Wimbledon. Since that loss, she has won just two of six matches played. This has been a transformative year for Boulter off the court, having married fellow professional Alex de Minaur in July, but the personal milestone has not translated into sustained competitive success.
How did the match unfold?
Muchova's performance was marked by exceptional shotmaking and court positioning. The seventh seed employed her signature all-court style, striking forehand winners past Boulter and advancing to the net with precision. She impressed with smart drop shots and piercing groundstrokes that left Boulter unable to mount any meaningful resistance.
The match was initially scheduled for Court 17 following a men's first-round encounter between rising star Rafael Jodar and Chinese lucky loser Yunchaokete Bu. However, when heavy rain suspended play with Jodar, the 12th seed, trailing 2-6, 1-6, 1-4, tournament officials relocated Boulter and Muchova to Louis Armstrong Stadium, one of the venue's two courts with retractable roofs. The Billie Jean King National Centre grounds came to a standstill during the downpour, with all attention focused on the covered courts.
What is Muchova's current form?
Muchova is competing for the first time since narrowly losing the Wimbledon final to her compatriot Linda Noskova following a minor surgical procedure. Her explosive start at the US Open suggests she has recovered fully and may be positioned to contend for another grand slam title. According to match records from September 2, 2026, Muchova was scheduled to begin play at 6:10 PM UTC in the women's draw. Her second-round victory over Boulter followed an equally dominant 6-3, 6-0 win over Sinja Kraus in the opening round, demonstrating consistent excellence across consecutive matches.
How did Pegula perform in her second-round match?
Jessica Pegula dispatched former Australian Open champion Sofia Kenin in just 56 minutes, winning 6-3, 6-1 in the second round. According to official WTA match statistics, Pegula's serving was particularly impressive, with 5 aces, 0 double faults, and 0 break points faced throughout the match. She lost only seven points on her serve in the entire contest, with 41% of her serves going unreturned—a remarkable figure that underscores her dominance.
While Kenin is known for her notoriously weak returning game, Pegula's serving upgrades reflect her broader commitment to continuous improvement throughout her career.
I love being able to keep challenging myself as a person and as a player. To play this sport, you have to have a lot of passion, you have to be a little crazy. You have to be a little neurotic with things. I like working on things, I like working hard. I love chasing – being able to get better at everything, knowing that I'm probably not ever going to get there but that's a whole point.
Where does Pegula stand in her career?
Pegula now occupies a fascinating position in her professional trajectory. After establishing herself as a consistent top-tier competitor for several years, she faces the challenge of capturing her first grand slam title—the final significant milestone in her career. According to player rankings at the time of the match, Pegula held the No. 3 ranking, while Kenin entered as a wildcard ranked No. 110.
Pegula is undoubtedly among the top contenders following an excellent run to the Cincinnati final, where she defeated Toronto champion Iga Swiatek in a thrilling three-set encounter before losing to Coco Gauff in the championship match. She has reached the final and semi-final at the US Open over the last two seasons, both times falling to Aryna Sabalenka in high-quality contests. Her return to her career-high ranking of No. 3, which she first achieved in 2022, underscores her consistency and sustained excellence on the professional tour.
The persistent question surrounding Pegula remains whether she can overcome her more successful rivals when they perform at their peak during the tournament's final stages. Her ability to convert deep runs into titles has eluded her thus far, despite the quality of her play.
What are the implications for the world No. 1 ranking?
Elena Rybakina currently holds a clear advantage in the race for the No. 1 ranking, needing only a semi-final appearance to definitively secure the top spot. However, Pegula remains mathematically in contention. Should Pegula win the US Open title and Rybakika fail to reach the semi-finals, Pegula would ascend to world No. 1 for the first time in her career.
Other British results
Fellow Briton Jacob Fearnley also failed to reach the third round, suffering a 6-3, 6-3, 3-6, 6-3 loss to Argentina's Tomas Martin Etcheverry. The world No. 32 recovered from losing the third set and falling a break behind in the fourth, while Fearnley's 57 unforced errors and 11 double faults ultimately proved costly.
Francesca Jones had better fortune, returning to win her first-round match against Poland's Magda Linette after it was interrupted by rain on September 1. Jones had won the first set 6-4 when rain halted play. When the pair returned on September 2, Linette appeared fresher, racing to a 5-0 lead and wrapping up the second set in 28 minutes. Jones rallied back in the decider, claiming the decisive break at 2-1 before completing the victory—just her second at grand slam level. "I've never been quite in this position so I was nervous with how I'd quite feel about coming back out," Jones said. "I thought I'd maybe handle it better than the score reflects." She will play either American 14th seed Iva Jovic or Poland's Magdalena Frech in the second round on September 4.
Jan Choinski also failed to reach round two, falling to a 6-3, 6-1, 7-6 (7-5) defeat by Dutchman Botic van de Zandschulp in a first-round match that had been pushed back to September 2 because of rain at Flushing Meadows.
What happens next?
The women's quarterfinals at the US Open are scheduled to begin on September 8, 2026. The tournament runs through September 13, with the second round having concluded on September 2. Pegula will advance to face her third-round opponent, while Muchova continues her quest for a second grand slam title this year.
Key Facts:
- Katie Boulter lost 6-1, 6-0 to Karolina Muchova in 58 minutes in the US Open second round on September 2, 2026, winning just one game
- Boulter has now lost five consecutive matches and won just two matches across all four grand slam tournaments in 2026
- Boulter's serve was particularly weak, with eight double faults, no aces, and just 33% of points won behind her first serve
- Jessica Pegula defeated Sofia Kenin 6-3, 6-1, losing only seven points on serve and facing zero break points
- Muchova has won her first two matches at the US Open with dominant performances following her Wimbledon final loss
