Four-time Grand Slam tournament champion and world number one, the Italian tennis player **[Jannik Sinner](https://www.benrothenberg.com/p/jannik-sinner-umberto-ferrara-hire-fitness-coach-clostebol-doping-positive-test)**, has spoken about his decision to rehire his former fitness coach **Umberto Ferrara**, with whom he ended his collaboration following a doping scandal. Ferrara was involved in the purchase of a cream that contained clostebol.

“The situation was different back then. Now everything has changed. I felt that at this moment, I needed someone who understands my body better. We worked together for two years before the break. His work was very beneficial for me. We focused on every aspect of my body: mobility, stability, and I noticed a significant improvement in my endurance. I think he did a great job. I also worked well with Marco [Panichi], but perhaps he wasn’t the best fit. With Umberto, I always had a good understanding,” Sinner said, according to the website of **Ben Rothenberg**.