"Sinner still does not know himself very well"

Filippo Volandri, captain of the Italian Davis Cup team, and Paolo Lorenzi, former tennis player, analyzed the lack of physical endurance of their compatriot.

Andrés Tomás Rico | 5 Feb 2026 | 16.00
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"Sinner still does not know himself very well." Photo: Getty Images
"Sinner still does not know himself very well." Photo: Getty Images

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Jannik Sinner already knows where he needs to improve. Technically, he is close to perfection; all his shots are lethal, and he has been working on all his weaknesses, particularly his serve. However, the second-ranked player's pending task lies in his physical form. 

In his demanding match against Novak Djokovic , it was evident that his body and tennis game couldn't keep up when the match extended. In fact, he has a concerning statistic of not winning any of the eight matches that have gone beyond three hours and 50 minutes, along with a record of six wins out of 16 in fifth sets.

These statistics contrast with his four Grand Slams. When Sinner unleashes his powerhouse game, he dominates most opponents except for Carlos Alcaraz, whom he may defeat in three or, at most, four sets. However, he struggles to maintain that intensity and relentless rhythm when matches prolong.

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Filippo Volandri and Paolo Lorenzi lament Jannik Sinner's lack of physical endurance

This concern is widespread in Italy, where his compatriots witnessed his fading energy levels while Djokovic's experience and composure guided him to victory in the Australian Open semifinals. Addressing this issue is someone who knows Sinner well, Filippo Volandri, the Italian Davis Cup team captain.

"He doesn't yet know himself well enough to say, 'I know what to do because I've been there before and I know my body well.' Jannik has significantly improved in recent months but doesn't have enough matches under his belt to confidently manage situations: 'Now I will handle this because I know I have the margin,'" stated the three-time Davis Cup champion in remarks quoted by SuperTennisTV.

Volandri suggests that Sinner should reflect on how he managed the final stretch of the last season, where with minimal energy reserves but a full gas tank, he consecutively won the Vienna ATP 500, Paris Masters 1000, and ATP Finals, defeating Alcaraz in the Turin final.

Another Italian former tennis player, Paolo Lorenzi, who reached world number 33, also shared his views on the second-ranked player's physical condition: "It's normal; in his last eight five-set matches, he didn't lose due to weakness but perhaps due to lack of experience. However, there's optimism: with time, he will become a formidable player even in the fifth set."

Jannik Sinner acknowledges this issue, just as he has always recognized his major weaknesses. Thus, he faces a new challenge in which he must enhance his physical capacity and energy without compromising his suffocating and lethal pace. Jannik has homework to do.
 

This news is an automatic translation. You can read the original news, "Sinner todavía no se conoce muy bien a sí mismo"