Novak Djokovic out in US Open 1st round for the first time. Pegula, Medvedev, Kostyuk among winners

Novak Djokovic experienced a surprising early exit from the US Open tournament. Mariano Navone defeated the champion in a lengthy and challenging opening match. Other players like Jessica Pegula and Marta Kostyuk advanced easily on Sunday. Major stars including Aryna Sabalenka and Carlos Alcaraz begin their campaigns on Monday. The US Open venue is undergoing significant renovations and improvements.