The legendary list of US men to win Olympic gold in the 100m free:
While the Aquatics Centre is, of course, largely empty, itâ€™s far from quiet, with a few hundred officials and team members from various countries cheering on the swimmers from the stands. The US contingent is one of the biggest, most animated and loudest, with some of them banging noise-sticks and chanting U-S-A! U-S-A!
Even before Caeleb Dressel and Katie Ledecky dive in later in the session the Americans have had some medal success to shout about, with Bobby Finke winning gold in the menâ€™s 800m freestyle and Regan Smith and Hali Flickinger taking silver and bronze respectively in the womenâ€™s 200m butterfly.
He was the youngest. But he was the fastest. On Thursday, 22-year-old Zac Stubblety-Cook won the first gold medal for Australiaâ€™s men at the Tokyo Aquatics Centre, beating home a more experienced field to break the Olympic record in the 200m breaststroke final.
Stubblety-Cook started slowly, touching the wall in sixth at the first turn. But the Australian slowly reeled back fast-starting Dutchman Arno Kamminga, touching third at the final turn before a stunning last lap lifted Stubblety-Cook to the top step of the podium.
His win adds another gold to Australiaâ€™s burgeoning medal tally in Tokyo – with the potential for more to come later in the morning on Thursday.