Italian Jannik Sinner 's victory at the 2026 Miami Open , defeating Czech Jiri Lehecka on Sunday, March 29, 2026 , marked another impressive chapter in the young tennis player's career. With a solid and confident performance, Sinner won an important title in the United States, showing that he is becoming increasingly competitive on the world circuit. Miami Open 2026 Final - Jannick Sinner vs. Jiri Lehecka This triumph not only reinforces his position as second in the AT