Small excerpt from Jeff Sackmann’s recent article about Jannik Sinner’s serving
Full article: https://www.tennisabstract.com/blog/2025/01/28/the-locked-down-serve-of-jannik-sinner/
Full article: https://www.tennisabstract.com/blog/2025/01/28/the-locked-down-serve-of-jannik-sinner/