Cerúndolo Stuns Three-Time Champion Tsitsipas in Opening Round of 2026 Monte Carlo Masters

In a result that shifted the landscape of the 2026 Rolex Monte-Carlo Masters, 16th seed Francisco Cerúndolo secured a landmark victory on Monday, defeating three-time champion Stefanos Tsitsipas 7-5, 6-4. The win marks the first time Cerúndolo has beaten the Greek star and represents a historic low for Tsitsipas at a venue he has long dominated.

For Tsitsipas, the defeat is more than just a first-round exit; it is a statistical anomaly. In eight appearances at the Monte Carlo event, the former World No. 3 had never lost his opening match. That streak ended abruptly in Monaco, as the Greek struggled to find his rhythm on the clay, committing 38 unforced errors throughout the contest.

A Turning Point in the Rankings

The match served as a stark illustration of the diverging trajectories of the two players. Cerúndolo entered the match in peak form, currently sitting at a career-high No. 17 in the PIF ATP Live Rankings. Conversely, Tsitsipas has tumbled to No. 64, his lowest ranking since 2018, and is expected to exit the Top 60 following this result.

While Tsitsipas has historically treated Monte Carlo as his “favorite hunting ground,” the 2026 opener proved that pedigree alone cannot overcome current form. Cerúndolo played with a level of confidence that suggested he was the favorite from the first serve, effectively neutralizing the three-time champion’s strengths.

Match Breakdown: Momentum and Mental Toughness

The contest was defined by shifting momentum and a decisive clinical edge from the Argentine. Cerúndolo signaled his intentions early by breaking in the opening game. However, the first set remained competitive, with Cerúndolo forced to break back at 3-5 to maintain his lead before eventually closing it out 7-5.

The second set began with a dominant surge from the 16th seed, who raced to a 4-0 lead. For a moment, it appeared the match would end in a rout. Tsitsipas showed a flash of his championship resilience, fighting back to level the set at 4-all, but he could not sustain the comeback. Cerúndolo remained mentally steady, closing out the set 6-4 to seal the victory.

Reflecting on the win, Cerúndolo acknowledged the difficulty of facing Tsitsipas in Monaco. “I’d lost twice to Stefanos on indoor hard courts so I knew that today it would be different, but he’s won here three times, so I knew it would be super difficult,” Cerúndolo said. “I felt really good and played a great match. I got a little tight in the second set and he started to play better, but I stayed tough mentally and managed to close it out.”

Joining the Argentine Elite

This victory is a milestone for Cerúndolo’s career, marking his 50th match win at the ATP Masters 1000 level. In doing so, he enters the record books alongside some of the greatest clay-court specialists from Argentina.

To understand the magnitude of this achievement, one can appear at the historical leaders for Argentine Masters 1000 wins. Cerúndolo now joins a prestigious list of countrymen who have excelled at this level of the tour.

What’s Next in Monte Carlo

With the shock of the Tsitsipas exit still reverberating through the draw, Cerúndolo advances to the second round. He is scheduled to face Czech player Tomas Machac, who earned his spot with a hard-fought 6-4, 1-6, 6-3 victory over Daniel Altmaier.

As the tournament progresses, all eyes turn toward the top of the bracket. With Tsitsipas out, the spotlight intensifies on the battle for the world No. 1 spot, as Jannik Sinner and Carlos Alcaraz begin their high-stakes race toward Roland Garros. Sinner, in particular, is chasing his fourth consecutive ATP Masters 1000 title.

For tennis fans, the story of the week remains Cerúndolo’s ascent. By dismantling a former king of Monte Carlo, the Argentine has signaled that he is no longer just a contender, but a genuine threat on the clay.

Next Checkpoint: Francisco Cerúndolo faces Tomas Machac in the second round of the Rolex Monte-Carlo Masters.

Do you believe Cerúndolo has the momentum to make a deep run in Monaco this year, or was this a result of Tsitsipas’s current slump? Let us know in the comments below.