Coach reveals Jannik Sinner’s fiery temperament and disciplined rise

Coach Simone Vagnozzi told the Corriere della Sera that Italian tennis star Jannik Sinner, while appearing calm on court, actually has a "fiery" personality that he has learned to channel. Vagnozzi explained that Sinner came to the partnership in 2022 with a clear ambition to move beyond a top‑ten ranking and that disciplined work on tactics, serve speed and point‑construction has helped him climb to world No. 1.

The interview also covered Sinner’s handling of a recent doping suspension, which Vagnozzi described as a difficult moment that ultimately gave the player extra time to focus on fitness and mental preparation. Vagnozzi highlighted the support of co‑coach Darren Cahill and the long‑standing relationship with manager Alex Vittur, noting that the stable coaching environment allows Sinner to stay humble and continuously improve.