First career meeting between the two players.
No. 11 seed Karolina Muchova battles 27th seed Marta Kostyuk in the 2025 US Open Fourth Round on Monday. While the Czech superstar is a former Grand Slam runner-up and two-time US Open semifinalist, Mostyuk has already achieved her career-best outing at this event. The winner of this match will face either Coco Gauff or Naomi Osaka in the last eight stage. Follow The Playoffs News and BetMGM for everything you need to know about this year’s US Open.
Both Muchova and Kostyuk are searching for their first title of the season. Ranked No. 13 and No. 28 in the world respectively, they are among the most flashy ball strikers on the women’s tour. With Flushing Meadows set to host their first ever meeting, the head-to-head between these two players currently stands at 0-0. The 29-year-old Czech sensation has endured a hat-trick of three set battles against Williams, Cirstea and Noskova to reach this stage. Meanwhile, her Ukrainian opponent defeated Boulter, Sonmez and Parry.
Karolina Muchova knows a thing or two about successful Grand Slam runs. She reached the Roland Garros final in 2023, and also made three semifinals at the two hard court majors combined. A former World No. 8, her best performances this year are semifinal appearances at the Linz Open and Dubai Tennis Championships. Meanwhile, Marta Kostyuk began the year with three opening round losses in her first six competitions. Despite going winless throughout the grass court campaign, quarterfinal showings at Madrid and Montreal kept her season afloat.
| Karolina Muchova | Category | Marta Kostyuk |
| 13 | Current Ranking | 28 |
| 319-156 | Career W-L Record | 238-145 |
| 19-12 | YTD W-L Record | 24-17 |
| 1 | Career Titles | 1 |
| 0 | YTD Titles | 0 |
| 0 | Grand Slams | 0 |
This match definitely has the potential to be one of the best pre-quarterfinal clashes at this year’s US Open. Kostyuk is a mental giant, and fights until the very last point. Her groundstrokes possess more zing and venom than opponents think – Muchova will need to be prepared for this. On the other hand, Czechia’s premier starlet will offer Kostyuk minimal pace to work with. She will ask the question in all of Kostyuk’s service games, making this a physically and mentally taxing match-up.
Prediction: Karolina Muchova in three sets.
Muchova holds a slight edge in the pre-match betting market against underdog Kostyuk. The odds suggest a potential three-setter, with Muchova most likely to earn more service breaks. According to the implied probability on the money line, Muchova has a 59% chance of advancing to the quarterfinals. Take a look at the odds (as per BetMGM):
(According to BetMGM: BetMGM offers exclusive promo codes, bonus deals and accurate odds for users upon signing up. Use BetMGM to ace your betting game in all sports!)
(Image Credits: Mike Frey, Imagn Images)
