Day 3 in Rio saw Michael Phelps bring his career gold medal haul to 21. It saw the 'Final Five' cement their status as the best gymnasts in the world. It saw another appearance on the podium from swimming sensation Katie Ledecky. It saw top-ranked Serena Williams upended by a relative unknown. And it saw men's rugby sevens contested for the first time ever.
Sound fun? It certainly was! Relive the day by watching all the top highlights below.