Another dominant day for the United States with four gold medals, including winning both men’s and women’s 4×100 medley relays, as Michael Phelps picked up gold medal number 23 of his career, the final one it seems. Mo Farah won one of three gold medals for Great Britain by repeating as 10,000 meters champion, and Jamaica’s Elaine Thompson positioned herself as the fastest woman in the world with a gold medal in the women’s 100 meters.