US sprint king Noah Lyles powered to gold by just five thousands of a second Sunday in the closest 100m in modern Olympic history, as Novak Djokovic added a tennis gold medal to his glittering CV. A thrilling ninth day of Olympic action also saw two world records tumble in the Paris pool, the first-ever gymnastics gold for an African nation and the Refugee Team's first medal in history. But as darkness fell, all eyes were trained on the lilac track of the Stade de France, where Lyles, 27, was bidding to end two decades of Olympic sprinting hurt for the US.