On the last day of August 2026, Novak Djokovic — a man whose name has become synonymous with tennis greatness — walked off the US Open court in the first round, defeated by Francisco Navone while carrying an undisclosed ailment. It is the nature of sport, and perhaps of all human endeavor, that even the most dominant figures must eventually reckon with the limits of the body and the relentless ambition of those who follow. This loss does not erase what Djokovic has built, but it opens a question that champions must one day face: when does a chapter end, and what begins after?