New York, Aug. 31 -- Argentina's Mariano Navone described his victory over 24-time Grand Slam champion Novak Djokovic as the "best day of his life" after producing a stunning upset in the first round of the US Open 2026 men's singles tournament.

The unseeded Navone defeated Djokovic 7-6(5), 5-7, 4-6, 6-2, 6-1 at Arthur Ashe Stadium, handing the Serbian legend his first Grand Slam first-round exit in 20 years and ending his pursuit of a record 25th major title.

Speaking after the landmark win, Navone said defeating his childhood idol on one of tennis' biggest stages was an unbelievable feeling.

"It's an unbelievable feeling right now. Novak has been my idol since I was a kid. Until a few years ago, I was outside the top 100, so I didn't...