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Michael Phelps, Caeleb Dressel, Nathan Adrian and Ryan Held of USA pose with their gold medals after winning the men's 400m freestyle relay. Reuters
USA's Michael Phelps kisses his first Olympic gold medal at Rio 2016, his 19th overall. Reuters
Great Britain's Adam Peaty won Olympic gold and became only the fourth British man to win an Olympic swimming title in 40 years when he romped home in the 100 metres breaststroke final. Reuters
USA's 19 year old Katie Ledecky broke the world record with time of 3:56:46 and won gold in 400-Meter freestyle. Reuters
Kosovo's judoka Majlinda Kelmendi looks emotional as she won her country's first gold medal at their maiden Olympic Games. Reuters
Venus and Serena Williams, three-time Olympic doubles gold medalists suffered a shock defeat to the Czech Republic’s Lucie Safarova and Barbora Strycova. Reuters
Serbia's Novak Djokovic looks distraught as he was beaten by Argentina's Juan Martin Del Potro in the first round of men's singles. Reuters