Flavio Cobolli’s Breakout Summer Reaches Fever Pitch at US Open

Flavio Cobolli is having a moment. The Italian is trending across social media on Tuesday as he takes the court against Francisco Comesana in the first round of the US Open, just days after a heartbreaking mixed doubles final loss alongside Belinda Bencic and weeks after the biggest singles breakthrough of his career in Cincinnati.

The 24-year-old Roman has climbed to a career-high ranking inside the top seven this season, and with Jannik Sinner sidelined from Flushing Meadows, Cobolli has stepped into the role of Italy’s top man in New York as the tournament’s No. 5 seed. His rise has been steady but unmistakable — a Roland Garros final appearance in June, a maiden ATP Masters 1000 semifinal in August, and now a deep run through the US Open’s opening week.

The Cincinnati Breakthrough That Changed Everything

Cobolli’s surge into the sport’s upper echelon crystallized in Cincinnati, where he rallied from a set down to beat American Tommy Paul 2-6, 6-3, 6-4 in the quarterfinals, clinching his first-ever ATP Masters 1000 semifinal appearance. The win was historic in more ways than one: Cobolli became just the fourth player in the tournament’s modern history to reach the Cincinnati semifinals after needing three sets in every match along the way, joining Andre Agassi (1996), Thomas Muster (1997) and Carlos Alcaraz (2023) on that short list. He also became just the second Italian man to reach the Cincinnati final four, following Sinner’s back-to-back runs in 2024 and 2025.

The result vaulted Cobolli to a new career-high ranking, and it came on the heels of an even bigger milestone — his first career Grand Slam singles final, reached at Roland Garros in June. Between the Paris final and the Cincinnati semifinal, Cobolli has quietly built one of the most productive seasons of any player not named Sinner or Alcaraz, racking up three ATP Tour titles and a win-loss record that has him firmly in the mix for a spot at the ATP Finals in Turin.

A Mixed Doubles Heartbreaker, Then Back to Singles

Just days before his US Open singles opener, Cobolli was part of one of the most dramatic matches of the tournament’s opening week. Paired with Swiss star Belinda Bencic as the No. 4 seeds in the US Open’s revamped mixed doubles event, Cobolli helped the duo battle past Elina Svitolina and Gael Monfils in the semifinals before running into the red-hot Czech pairing of Karolina Muchova and Jakub Mensik in the final. Muchova and Mensik, playing together for the first time, edged Bencic and Cobolli 6-3, 1-6, 10-6 in a deciding match tiebreak that stretched into the late hours of Arthur Ashe Stadium, with Mensik sealing it with an ace to claim the $1 million prize for the Czech pair.

The turnaround for Cobolli has been quick. Days after that mixed doubles final, he opened his singles campaign against Argentina’s Francisco Comesana, ranked well outside the top 100, at Louis Armstrong Stadium. Cobolli entered the match holding a 1-0 career edge over Comesana, with the pair’s lone previous meeting also breaking in the Italian’s favor. Given the gap in ranking and form between the two, Cobolli was the heavy favorite to move through to the second round and continue building toward a potential fourth-round showdown with No. 3 seed Felix Auger-Aliassime, who occupies the same quarter of the draw.

What’s Next for Italy’s Top-Ranked Man in New York

With Sinner not in the field, all eyes on the Italian contingent in New York have shifted to Cobolli, and the pressure comes with real stakes. A strong run through the draw would further cement his push toward the year-end ATP Finals in Turin, where he currently sits well inside qualification position in the season-long Race rankings. Bettors watching the men’s draw have noticed the shift, too — Cobolli’s odds to make a deep run have shortened considerably since Cincinnati, and sportsbooks now list him among the notable dark horses in the bottom half of the bracket. Fans tracking his matches can follow live sports betting odds as the tournament progresses through the second week.

Whatever happens against Comesana and beyond, 2026 has already been a career-defining season for Cobolli. A maiden Grand Slam singles final, a first Masters 1000 semifinal, and now a mixed doubles final appearance in the same summer stretch — few players anywhere in the sport have compiled a more eventful few months. The Italian’s trajectory suggests this US Open run, wherever it ends, is unlikely to be the last time his name trends this year.