Iga Swiatek shrugged off lingering weariness to partner Casper Ruud to back-to-back victories in the revamped mixed doubles competition at the US Open on Tuesday.
Swiatek – who on Monday had battled through a two-hour tussle with Jasmine Paolini to win the Cincinnati Open – looked full of energy as she and Ruud powered into Wednesday's semifinals.
Swiatek and Ruud needed just 39 minutes to dispatch the US pairing of Madison Keys and Frances Tiafoe 4-1, 4-2 in their opening game at Arthur Ashe Stadium, and then reappeared roughly 20 minutes later to defeat Caty McNally and Lorenzo Musetti 5-3, 4-2 in their quarterfinal clash.
What a way to finish!
— US Open Tennis (@usopen) August 19, 2025
Iga Swiatek lands the volley and advances to the quarterfinals with Casper Ruud! pic.twitter.com/fNtuhteMRY
The victories capped a gruelling 24 hours for Polish star Swiatek, who hot-footed it to the airport after Monday's win in Cincinnati and only arrived at her hotel in New York in the early hours of Tuesday.
"Honestly the last two days have felt like one day, but I'm super happy to be here," Swiatek said, adding that her tight turnaround had helped her unwind after her exertions in Cincinnati.
"Honestly I think actually it's kind of nice for the recovery," Swiatek said. "To have another task and to not let yourself be lazy but also focused on the next exciting thing."
Win in Cincinnati ✅
— US Open Tennis (@usopen) August 19, 2025
Fly to New York ✅
Join Casper Ruud and win Round 1 match ✅ pic.twitter.com/KAuE1v6eCb
Ruud and Swiatek had just enough time to fit in a quick practice before taking to the court in their first match as a doubles pairing.
"I was happy to team up with Iga," Ruud said afterwards. "She's on the winning train these days so I'm just jumping on the train and let's see if we can win some more before the mixed doubles is over.
"I think everyone should show some appreciation to Iga today. She only got to her hotel 12 hours ago at 2.30am, and she's here playing."
ALCARAZ, DJOKOVIC OUT
Swiatek and Ruud will meet top seeds Jessica Pegula of the United States and Britain's Jack Draper in Wednesday's semifinals.
Pegula and Draper clicked smoothly to eliminate the glamour pairing of Carlos Alcaraz and Emma Raducanu 4-2, 4-2 in the first round before easing past Russia's Daniil Medvedev and Mirra Andreeva 4-1, 4-1 in the quarterfinals.
What a point for Pegula and Draper to capture the first set! pic.twitter.com/ywWFd1pOHd
— US Open Tennis (@usopen) August 19, 2025
Medvedev and Andreeva had earlier romped past Novak Djokovic and Olga Danilovic in straight sets in the first round, winning 4-2, 5-3.
Mirra and Medvedev are moving on! pic.twitter.com/046ZGoA78T
— US Open Tennis (@usopen) August 19, 2025
In other results on Tuesday, US tennis icon Venus Williams and partner Reilly Opelka exited against Karolina Muchova and Andrey Rublev, losing 4-2, 5-4.
Italy's reigning champions Andrea Vavassori and Sara Errani ousted second seeds Elena Rybakina and Taylor Fritz 4-2, 4-2.
Statement made 👊
— US Open Tennis (@usopen) August 19, 2025
2024 champions Errani/Vavassori take out Fritz/Rybakina 4-2 4-2 and are the first team through to the quarterfinals! pic.twitter.com/fVbGsFn4xM
Earlier Tuesday, world No 1 Jannik Sinner's withdrawal from the mixed doubles was confirmed as expected. Sinner, who retired due to illness in the first set of his Cincinnati Open final with Alcaraz on Monday, was due to partner Katerina Siniakova in the doubles.
Sinner and Siniakova were replaced in the draw by the American duo of Danielle Collins and Christian Harrison.
Collins/Harrison set up an all-American quarterfinal vs Townsend/Shelton! 🇺🇸 pic.twitter.com/Q46NLQulLH
— US Open Tennis (@usopen) August 19, 2025
This year's US Open mixed doubles competition is being held over Tuesday and Wednesday in the week before the main singles draws get under way.
The tournament is using a modified scoring system, with short sets to four games, no-advantage scoring, tiebreakers at four-all and a 10-point match tiebreak in lieu of a third set.
The final will be a best-of-three set match to six games, featuring no-advantage scoring, with tiebreakers at six-all and a 10-point match tiebreaker instead of a third set, with the winning pairing pocketing $1 million.