Japanese gymnast Kohei Uchimura -- the reigning Olympic champion -- competes on the parallel bars during the team all-around event. Japan won the gold.
Sprinter Usain Bolt, center, dances the samba during a news conference for Puma and the Jamaican Olympic Association. The world's fastest man will be defending his 100-meter title later in the Games.
Hungary's Katinka Hosszu celebrates after winning the 100-meter backstroke. It was her second gold medal in Rio.
Hong Kong's Wong Chun Ting, left, plays Japan's Koki Niwa in table tennis. Niwa won to clinch a spot in the quarterfinals.