KK56 New York - Srbský tenista Novak Djokovič reaguje počas tréningu s Nemcom Alexandrom Zverevom na grandslamovom turnaji US Open vo Washingtone 26. augusta 2026. FOTO TASR/AP Novak Djokovic, of Serbia, reacts during a practice with Alexander Zverev, of Germany, at the U.S. Open tennis championships Wednesday, Aug. 26, 2026, in New York. (AP Photo/Frank Franklin II)