Karolina Muchova and Jakub Mensik Crowned US Open Mixed Doubles Champions

Karolina Muchova and Jakub Mensik walked into Arthur Ashe Stadium on Wednesday as a new pairing with matching kits and modest expectations. They walked out as US Open mixed doubles champions.

The Czech duo claimed their first Grand Slam title as a team with a 6-3, 1-6, 10-6 victory over Switzerland’s Belinda Bencic and Italy’s Flavio Cobolli, a final that swung wildly before settling on the side with the bigger serve and the bolder finish.

Czechs Strike First

From the start, Mensik set the tone. The 20-year-old uncorked serve after serve under the Ashe lights, giving Muchova the freedom to roam and attack at the net. The pair broke early, settled quickly, and never looked rattled in a brisk opening set.

On set point, Mensik went back to his biggest weapon. One more booming ace, this one past Bencic, sealed the set in under half an hour. It felt routine. Too routine for a major final.

The match refused to stay that simple.

Bencic Hits Back

Bencic, one of the most seasoned competitors on the court, snapped the rhythm. At 2-1 in the second, she drilled a fierce return winner to break serve and ignite the Swiss-Italian pairing. Her timing sharpened, her returns bit harder, and Cobolli settled into his baseline patterns.

The pressure flipped. Muchova and Mensik, so fluid in the first set, suddenly found themselves chasing.

Bencic kept coming. Serving for the set, she got the slice of luck her resurgence deserved: a forehand that clipped the net cord, skipped over Muchova’s racquet, and dropped in to level the match at one set all. The crowd roared. The final had a pulse now.

Match Tiebreak, Big-Point Tennis

Everything came down to the deciding 10-point match tiebreak, where one loose return or one nervy second serve can rewrite an entire week.

Mensik refused to blink.

His serve, already the defining shot of the night, grew even larger in the breaker. He backed it up with sharp, aggressive work at the net, cutting off angles and forcing rushed replies from Bencic and Cobolli. The Czechs surged ahead, and when Mensik punched away a firm volley for 8-4, the momentum felt irreversible.

Muchova then delivered at exactly the right time. She produced her best serve of the match to bring up championship points, a statement delivery under pressure that underlined why this partnership works: power from the back, poise up front.

One more ace from Mensik ended it. He leapt in celebration, soaking in the moment of clinching the first trophy of the season’s final Grand Slam.

From Match Points Saved to a Grand Slam Title

Their run to the title had already flirted with disaster. In the semifinals, Muchova and Mensik stared down two match points against Russians Mirra Andreeva and Andrey Rublev, only to escape and book their place in the final. Those tightrope moments hardened them for the pressure of a tiebreak with a major on the line.

By the time they stood with the trophy, the surprise was written all over Muchova’s words.

“I wasn’t really expecting to be standing here tonight. We came out just to have fun and enjoy these mixed doubles and now we are standing here. So we did something right,” she said during the ceremony, adding with a smile that the “matching outfits” might have made the difference.

She made a point of congratulating Bencic and Cobolli, then turned back to the bigger picture: “I think this is a really good start to the US Open for all of us.”

It feels like more than that.

In only the second year of the US Open’s revamped 16-team mixed doubles format — designed to pull leading singles players into the draw and energise the week before the main singles event — Muchova and Mensik have given the competition exactly what it wanted: star power, drama, and a title run built on razor-thin margins.

Now the question lingers over New York: if this is their “just for fun” partnership, what happens when they start chasing these trophies on purpose?