Jannik Sinner closed the 2025 ATP season in spectacular fashion, defeating Carlos Alcaraz 7–6, 7–5 to win his second consecutive Nitto ATP Finals title in Turin. The Italian extended his indoor unbeaten streak to 31 matches, went through the tournament without dropping a set and secured a record US$5.07 million prize. With dominant serving, clutch shot-making and a commanding head-to-head presence, Sinner ended the year as the clear leader of the Alcaraz–Sinner rivalry, bringing the ATP season to a dramatic finish.

The highly anticipated US Open final did not quite produce the epic spectacle some had envisioned—but Carlos Alcaraz hardly seemed to mind. On Sunday, the 22-year-old Spaniard overpowered Jannik Sinner 6–2, 3–6, 6–1, 6–4 to lift the US Open 2025 trophy, securing his sixth Grand Slam title in the process. With the win, Alcaraz also regained the world No. 1 ranking from his rival, capping off a fortnight of near-flawless tennis.