Kazakhstan’s Elena Rybakina stunned world No. 1 Aryna Sabalenka, defeating her 6-1, 6-4 in the quarterfinals of the WTA Cincinnati Open on Friday, August 15, 2025, in Ohio, United States. The victory, driven by 11 aces and a commanding serve, secured Rybakina a semifinal spot against Poland’s Iga Swiatek, who overcame Anna Kalinskaya 6-3, 6-4 on the same day. The matchup, one of the tournament’s most anticipated, pits Rybakina, who has won three straight matches against Swiatek this season, against a former world No. 1 determined to reach her first Cincinnati final in one of the two WTA 1000 events where she has yet to do so. The match reflects the intensity of the women’s circuit and the challenge of playing in near 30°C heat.
Rybakina’s win marked her fifth victory in 12 career matches against Sabalenka, the defending champion. The match was a personal revenge, as Sabalenka had beaten the Kazakh in Berlin two months earlier. Rybakina’s consistency in serving and precision in rallies were decisive, particularly in the dominant first set.
Swiatek, meanwhile, faced a 93-minute battle against Kalinskaya, needing five match points to secure the win. The Pole, with 47 victories this season, showed resilience in overcoming both the heat and her opponent, who saved four match points before conceding.
- Round highlights:
- Rybakina: 11 aces and 70% first-serve accuracy.
- Swiatek: Three service breaks against Kalinskaya.
- Conditions: 30°C temperatures impacted performance.
Rybakina’s serving dominance
Rybakina highlighted her serve as the key to her victory over Sabalenka. With 11 aces, she controlled critical points, especially in the second set, where she saved two break points with precise serves. The 26-year-old remained composed even as Sabalenka mounted a comeback, winning two consecutive games in the second set. “The serve was crucial today. I stayed consistent and varied my shots well,” Rybakina said post-match.
The win underscores her strong form, having defeated Swiatek three times this season. The rivalry, which has intensified in 2025, positions Rybakina as a favorite for the Cincinnati title, a key preparatory event for the US Open. Her campaign demonstrates adaptability to fast courts and intense heat, demanding extra physical preparation.
- Rybakina’s stats vs. Sabalenka:
- 5 wins in 12 matches.
- 11 aces, a personal tournament record.
- 28 winners against 15 unforced errors.
- Match duration: 1 hour, 12 minutes.
Swiatek’s pursuit of a maiden final
Iga Swiatek, the current Wimbledon champion and third seed, reached her fourth WTA 1000 semifinal of the season. The Pole struggled against Kalinskaya, particularly in the second set, requiring five match points to close out the match. The victory marks her first Cincinnati semifinal, one of the two WTA 1000 events where she has yet to reach a final.
The 24-year-old emphasized the challenge of playing in extreme heat. “The heat is getting tougher. We need to adapt to these changes,” Swiatek said, referencing Ohio’s high temperatures. Her performance against Kalinskaya featured three service breaks and an aggressive approach, with 22 winners and only 10 unforced errors.
Swiatek, with six Grand Slam titles, faces Rybakina at a critical juncture. Despite the Kazakh’s recent dominance, the Pole is confident in her ability to mix up her game and challenge her opponent.
Renewed rivalry between Rybakina and Swiatek
The semifinal between Rybakina and Swiatek is set to be a highlight of the Cincinnati Open. The two have clashed three times in 2025, with Rybakina winning each encounter. However, Swiatek, known for her consistency on clay and now on hard courts, aims to reverse the trend. Their first Cincinnati matchup adds an element of unpredictability.
Rybakina’s power-based, aggressive game thrives on the fast American courts. Swiatek, blending solid defense with precise counterattacks, could balance the matchup. Their head-to-head history suggests a close contest, with long sets and intense baseline exchanges.
- Head-to-head history:
- Rybakina leads 3-1 against Swiatek in 2025.
- Latest win: Rybakina in Indian Wells, 6-4, 7-5.
- Playing styles: Rybakina (attack) vs. Swiatek (defense and counterattack).
Weather conditions as a deciding factor
Temperatures near 30°C in Cincinnati have tested players’ physical and mental endurance. Rybakina noted the importance of staying focused during long rallies in the heat, while Swiatek stressed adapting to changing climate conditions on the tour. High humidity, combined with the heat, has increased physical strain, particularly in longer matches.
Tournament organizers implemented strategic hydration breaks to ensure player safety. The forecast for the semifinal indicates similar conditions, potentially favoring players with greater stamina, like Swiatek, who has shown resilience in adverse climates.
US Open preparation
The Cincinnati Open, a key lead-up to the US Open, serves as a gauge for the hard-court season. Rybakina’s victory over Sabalenka strengthens her status as a US Open favorite, where her 2022 Wimbledon title still resonates. Swiatek, aiming to solidify her season after a year of ups and downs, relies on her Wimbledon success as a highlight.
Both players are using Cincinnati to refine strategies and test new patterns. Rybakina’s powerful serve remains her trump card, while Swiatek focuses on transitioning between defense and attack. The semifinal is a critical test before the year’s final Grand Slam.
- US Open factors:
- Rybakina: Serve and aggression as strengths.
- Swiatek: Versatility and physical endurance.
- Cincinnati: Fast courts similar to the US Open.
- Fatigue: Heat may impact recovery for New York.
Semifinal expectations
The Rybakina-Swiatek semifinal is eagerly anticipated by fans. Their recent rivalry, combined with their high technical level, promises a balanced matchup. Rybakina holds the momentum, but Swiatek’s experience in big matches could be decisive. The match will also test their adaptability to heat and fast courts.
The Cincinnati Open, with a $3.2 million prize pool, is one of the WTA’s most prestigious events. The semifinal winner will face the victor of the other quarterfinal matchup, ensuring a high-stakes final.