Jannik Sinner is an Italian professional tennis player. He is currently ranked world No. 1 by Association of Tennis Professionals (ATP), and was the year-end No. 1 in 2024. Sinner has won 30 ATP Tour-level singles titles, including five majors, ten Masters and two ATP Finals titles. He led Italy to back-to-back Davis Cup crowns in 2023 and 2024. ATP world No. 1 from November 3, 2025 to November 9, 2025 — 1 weeks. Wiki link