There’s no stopping Novak Djokovic now. The Serbian sensation won the U.S. Open Monday night, clinching his third Grand Slam title this year. Djokovic beat Rafael Nadal in a four-set win, and despite Nadal’s winning the first point, Djokovic was dominant throughout the match. Djokovic has lost just two matches all season, and he has beaten Nadal in all the matches he has faced with him. Djokovic looked exhausted, and even took a medical timeout after the first game—but he managed to stay on top throughout the entire four-hour match.