Armed robbers posing as police officers held a gun to the forehead of U.S. gold medallist swimmer Ryan Lochte in a taxi hold-up in Rio de Janeiro on Sunday, feeding concern over safety at the first Olympic Games in South America.

Singapore swimmer Joseph Schooling returned home to a rousing welcome on Monday after winning the city-state's first ever Olympic gold medal with a stunning victory over the legendary Michael Phelps.

Usain Bolt stormed to victory in the 100 metres final to become the first man to win three successive Olympic titles on the track.

South African Wayde Van Niekerk smashed Michael Johnson's long-standing 400m record when he stormed to Olympic gold.

Usain Bolt finishes the semifinals of the 100m sprint atop the standings.

Britain's Andy Murray became the first player to win two Olympic tennis singles gold medals when he defeated Argentina's Juan Martin del Potro 7-5, 4-6, 6-2, 7-5 in a dramatic final.

Jeff Henderson of the United States wins gold in the men's long jump on Saturday, leaping 8.38 metres to snatch the title in the last round.

While the swimming events in these Rio Games will be remembered as Michael Phelps's last hurrah in his storied career, there were two women making waves of their own.

Two days of gruelling competition came down to two crucial seconds in the final 800m race, as Belgian pretender Nafissatou Thiam usurped Jessica Ennis-Hill as Olympic heptathlon champion.

Imperious distance runner Mo Farah said he was thrilled to make history after becoming the first British athlete to win three Olympic track golds after defending his 10,000m title on Saturday.

At 5ft 7in, Monica Puig does not look like the strongest female tennis player on the court.

Bangladesh's participation at the Rio Olympic Games came to a sorry end on Sunday after golfer Siddikur Rahman finished 59th out of 60 participants in the individual strokeplay event.

Michael Phelps brought the curtain down on one of sport's most storied careers with a dynamite relay swim to give himself 23 Olympic gold medals and declared it a perfect finale.

Elaine Thompson continued Jamaica's dominance in sprint by winning the women's 100m gold medal with a time of 10.71 seconds on Saturday, beating two-time defending champion and compatriot Shelly-Ann Fraser-Pryce to third place.

Neymar led Brazil into the semi-finals of the Olympics with his first goal of the competition to edge the third of a trilogy of grudge matches with Colombia in three years 2-0.

British distance runner Mo Farah recovers from a dramatic fall to defend his 10,000m title

Michael Phelps brings the curtain down on one of sport's most storied careers with a dynamite relay swim to give himself 23 Olympic gold medals.

Jamaica's Elaine Thompson surprises even herself by storming to victory in the Olympic women's 100 metres as compatriot Shelly-Ann Fraser-Pryce failed in her bid to win a third straight title.

Elaine Thompson becomes the fastest women when she claims the Olympic 100 metres sprint title.

Argentina's Juan Martin del Potro wins a semi-final thriller against Spain's Rafa Nadal.