Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. In Rio, the Fastest Man in the World Will Be Crowned Sunday by VOA News The fastest man in the world will be crowned Sunday at the Olympics in Rio de Janeiro, with Jamaican speedster Usain Bolt seeking an unprecedented third straight gold medal in the 100-meter dash. With the sprint lasting all of 10 seconds, the result will be decided by hundredths of a second. The 29-year-old Bolt is the favorite, despite a sore hamstring that forced him from the world championships last month. But he faces stiff competition, including from American sprinter Justin Gatlin, who posted the fastest time Saturday's preliminary heats. In all, 22 gold medals are at stake Sunday in 12 sports. The 400-meter final is expected to be a tight race between American LaShawn Merritt, Kirani James of Grenada and Wayde van Niekerk of South Africa. In tennis, Britain's Andy Murray is trying to become the first player to win two Olympic singles gold medals, facing Argentina's Juan Martin del Potro. British golfer Justin Rose takes a one-shot lead into the final round over Sweden's Henrik Stenson in the first Olympics golf championship in 104 years. Australia's Marcus Fraser is three shots behind Rose on the par-71 course. Gymnastics features the women's vault, uneven bars and pommel horse. American all-around champion Simone Biles goes for her third gold medal in Rio, competing in the vault. United States' Simone Biles performs on the balance beam during the artistic gymnastics women's team final at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Aug. 9, 2016. The men will decide gold on the floor exercise. Other final events Other final events will take place in boxing, fencing, track cycling, diving, sailing, shooting and weightlifting. Andras Redli (HUN) of Hungary competes with Jung Jin-Sun (KOR) of South Korea in the Men's Epee Team Quarterfinals, Aug. 14, 2016. The Sunday action started with the women's marathon on a sunny day just hours after American swimmer Michael Phelps won his 23rd Olympic career gold medal. It was his fifth of the Rio Games, in what may be the final race of his Olympic career. The most decorated Olympian in history swam the third leg of the 4x100-meter medley relay, coming from behind to pass Britain and give the U.S. the lead going into the final leg. United States' Michael Phelps walks with his national flag during the medal ceremony for the men's 4 x 100-meter medley relay final during the swimming competitions at the 2016 Summer Olympics, Sunday, Aug. 14, 2016, in Rio de Janeiro, Brazil. The first leg of the relay, the backstroke, turned out to be a world-record time by American Ryan Murphy, and that pushed the U.S. team toward an Olympic record time for the complete race. The U.S. women's 4x100-meter medley relay also won gold Saturday - the nation's 1,000th gold medal in Summer Olympics history. And on the final day of swimming competition in Rio, Italy's Gregorio Paltrinieri earned gold in swimming's most grueling race - the men's 1,500-meter freestyle. Connor Jaeger of the U.S. took silver. Earlier, Pernille Blume of Denmark held off American Simone Manuel to win the 50-meter freestyle. Track and field On the track, Jamaican Elaine Thompson took gold in the women's 100 meters in 10.71 seconds, ending a bid by her countrywoman, Shelly-Ann Fraser-Pryce, to win the sprint event at three straight Olympic Games. American Tori Bowie took silver, just ahead of Fraser-Pryce. The long jump crown went to American Jeff Henderson, earning the gold on his sixth and final jump. British runner Mo Farah was tripped by American training partner Galen Rupp on the 10th lap of the men's 10,000-meter race, but recovered to successfully defend his Olympic title. In the heptathlon, Belgium's Nafissatou Thiam beat out defending champion Jessica Ennis-Hill of Britain in a competition that went down to a matter of seconds in the last event. Elsewhere in Rio, Iran's Sohrab Moradi took gold in men's 94-kilogram weightlifting - the country's second weightlifting victory in two days - and Russia won its fourth fencing gold, crushing Ukraine in the women's team sabre event. Puerto Rican tennis player Monica Puig won the first Olympic gold medal for the U.S. territory in any sport Saturday, beating Germany's Angelique Kerber at women's singles in a big upset. Puig was unseeded, while the second-seeded Kerber won the Australian Open in January and was runner-up at Wimbledon in July. Muslim-American Ibtihaj Muhammad, the first U.S. Olympian to wear a hijab during competition, won a bronze medal in the women's team sabre event as the U.S. beat Italy, 45-30, to clinch third place and the first fencing medal in Rio for the American women. Russian suspended Meanwhile, Russian long jumper Darya Klishina is fighting her suspension from the games, saying the doping allegations against her are politically motivated. Darya Klishina talks to the media after competing the women's long jump in Zhukovsky, Russia, June 6, 2016. Previously, Klishina had been the only Russian track and field athlete exempted from a blanket ban on Russian-trained athletes implicated in a state-sponsored doping scandal. Klishina has trained the past three years in the U.S. state of Florida and was subjected to non-Russian drug tests. But reports say her name has surfaced in a lawyer's report on the scandal, putting the International Court of Arbitration for Sport under pressure to rule on her case before the long jump competition starts Tuesday.