Is Jannik Sinner a Concern?

Carlos Navarro | 20 Feb 2026 | 13.00

Sinner is in a small slump... or not? We debate. Source: Getty

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Jannik Sinner had not lost to a player outside the top-10 on hard courts since 2023. Over two years of undisputed dominance on his favorite surface, cementing an aura and feeling of invincibility that made us wonder where the limit of this beast was. However, as in all processes, and thanks to the high bar set by the one from San Candido, unexpected defeats have sparked debate on social media, with the public clearly wondering if it is time to be concerned about the current moment of the Italian.

It is not just his loss to Jakub Mensik. It is also the manner in which he lost: diminished, lacking depth in his shots, devoid of brilliance, at times blurred. The Czech only needed to rely on a monstrous serve in a third set of easy navigation: Jannik gifted him the first break in a game with three unforced errors (which is not characteristic of Sinner to let go in that manner after winning the second set) and, from then on, he could not find space to face the first blow of the Central European. Credit must be given to Jakub: his serve was a point-winning machine, from the baseline he weathered the storm, and physically he was more prepared than ever... but the best returner on the circuit, statistically, didn't even tickle him in the deciding set.

It's a strange feeling: what happened yesterday in Doha is not far from what happened in Australia. That day, Sinner was overcome from the back of the court, unable to dictate his terms, against Djokovic who accelerated better with his shots from the baseline, especially the parallel forehand. It was Djokovic's greatness, the sense of urgency and legacy in his last bullet, that stood out on that cold January night in Melbourne; the spotlight was not on Jannik's performance, which may not be the case this time.

Analyzing the reasons behind Sinner's slight downturn after his last two defeats

There are several points to consider before truly answering the premise of this article. What could be causing this momentary dip for the Italian? We need a kind of footnote, an addendum, before addressing this issue: how darn good must Jannik Sinner be if just two defeats can trigger these questions. The level of demand that the Italian has presented to the circuit, which prompted Carlos Alcaraz to reinvent himself and chase him with more hunger than ever, is such that just a couple of stumbles make many sound some alarm bells. Yes, that's how good the Italian is.

It's no excuse not to notice, however, that decline we were talking about. Jannik mentioned, after his defeat to Alcaraz in New York, that he was willing to embrace defeat in the midst of a comprehensive transformation as a player. He wanted to become more unpredictable: he didn't mind being more vulnerable if, in the long run, it paid off by growing as a player. The reality is that this scenario was far from happening in the final stretch of 2025: a triumph in Vienna, Paris, and the ATP Finals displaying the usual unbeatable version, being a steamroller and, to top it off, showing some improvements in the mentioned variety.

However, when you are a legend, dissatisfaction is part of your DNA. Not content with that, the Italian extended his preseason for 2026, a move that may now be affecting him: he admitted yesterday that he arrived for this year, slightly less fresher physically. Perhaps this is one of the reasons why his tennis from the baseline is less dangerous: yesterday he averaged lower marks both on his forehand and backhand than Mensik, unable to set his ball rhythm from the back, unable to generate the kinetic energy and produce the power his shots and his tennis style need (you have to be very strong physically to maintain that intensity and explosiveness).

This aspect can easily combine with an order that, perhaps, has been lost. Why? That constant pursuit of unpredictability, that need to embrace Plan B, may have made it even harder to return to the starting point. That returning to Plan A is not the same: there are not as many repetitions in his shots, there is not the same confidence in his strokes. Wanting to incorporate new aspects, facing the threat and presence of Alcaraz, has caused his foundation to suffer, his tennis foundations to weaken. Sinner, the same one who won by rhythm and dominance, wanted to add new paths to victory... and left his main path in a worse state than he found it previously. That's how his defeats arrived: not by starting to serve and volley as the main plan, not by leaning on drop shots and missing, but by being significantly inferior from the baseline against Novak and Jakub.

Is Sinner's downturn truly cause for concern?

The million-dollar question has an easy answer: look at what happened to Carlos Alcaraz last year. The roadmap doesn't differ much: a somewhat surprising defeat, in form and substance, to a Novak as experienced as imperious; a loss in Doha against a young Czech, in the quarterfinals, who overpowered you with a great mix of blazing first serves and great baseline tennis; a sense of less spark on the court, different body language, doubts about the consistency and order in your tennis.

What happened next is well known: Carlos, as the generational player he is, found the way and once he got back on the positive track, he returned stronger than ever. Sinner, as a generational player he also is, is more than capable of regaining the power and precision in his shots, of establishing the 'terror' reign (for the rest, of course) with which he has threatened (and delivered) in the past two years; ultimately, to return to that almost unbeatable version that he has already shown glimpses of in the last two months.

He mentioned yesterday in a press conference that perhaps the changes in his tennis may not be visible until the clay court season. That's where he will find full motivation, with the pursuit of the Career Grand Slam and of redeeming himself from last year's final in Paris. It's there where the variations, where the improvements in the Matrix, can be more effective than ever. It's there where his tennis should find that updated, complete version, where the balance between what has always worked and the enthusiasm for the consolidated improvements merge into a seamless whole.

Until then, Jannik has not given us reasons to doubt him. He has not given us reasons to think catastrophically: on the contrary, what we have seen in these past two years is abnormal, a level of dominance only challenged by a few names. Jannik, as Carlos demonstrated last year, is also human: time and ambition are in his favor to complete this metamorphosis process as soon as possible. Once he incorporates the concepts he's working on, his rock-solid and unstoppable version from the baseline will return... and not even a couple of early defeats can change the perception that this moment is inevitable. No, at least not when we talk about a generational talent.

This news is an automatic translation. You can read the original news, ¿Preocupa Jannik Sinner?