2016 Rio Olympics

Australia's athletes have been banned from two of Rio de Janeiro's popular beaches after dark due to security concerns.

American six-time Olympic gold medallist Ryan Lochte was confirmed to have been held up at gunpoint on Sunday, while two Australian rowing coaches were robbed at knifepoint shortly after the Games' opening ceremony.

Lochte, Gunnar Bentz, Jack Conger and Jimmy Feigen were stopped by people posing as armed police, the US Olympic Committee (USOC) said in a statement.

The robbers demanded money and other personal belongings.

After reports emerged of the incident, the USOC initially denied that Lochte had been robbed.

"All four athletes are safe and co-operating with authorities," the USOC's statement said.

The group had been attending a party at the French Olympic team's hospitality house when their taxi was stopped on the way back to the athletes' village.

Rose, who hit a hole in one on his first day, carded a final round four-under-par 67 to beat Sweden's Henrik Stenson by two shots in a competition that went all the way to the final putts. American Matt Kuchar claimed bronze.

"I've been thinking about Rio for a long, long time," Rose said. "To come out of it with a medal is incredible, and to come out of it with gold, unbelievable."

RNZ reports the rules state that athletes are meant to shoot in shorts but the 18 year old said he wanted to do something different to showcase his heritage and the judges agreed to the request.

"It gives you a bit of a boost to know, to actually feel the tradition and the culture. The last couple of days I was thinking of it and I tried it on and I shot fine in it with the wind but it was mainly just to show how proud we are to be Tongan, the team in general...there's a line called "Tongan Pride"...it had to show some of my culture, some of what we actually have in Tonga."

RNZ reports the Micronesian country has five athletes competing in Rio in weightlifting, swimming and athletics.

Twenty-three year old swimmer Giordan Harris is the veteran of the group, having competed at the London Games four years ago.

The other four are all between 17 and 19 years-old.

The Secretary General of the Marshall Islands National Olympic Committee, Terry Sasser, said they are building a group of athletes who would reach their peak over the next decade.

Wisil will hit the track to compete in heat seven of round one in the 100m sprints event against Breen and seven other runners.

Her race is confirmed to take place at 12.22pm PNG time.

Wisil’s coaching staff on ground report that the sprint Queen is a more confident athlete than in 2012 and has worked really hard on being able to finish her races better.

Wisil, who ran an Olympic qualifying time of 11.29 seconds in Fiji last month, is exempted from the preliminary round through to round one.

Banks closed, shops shut and revellers took over the streets of Suva dancing, singing and cheering.

Fiji claimed the gold medal after defeating Great Britain 43-7 in the rugby sevens final at Deodoro Stadium.

Thousands of people across the island nation had stopped what they were doing to watch the history-making match.

Singapore's Joseph Schooling competed against decorated US Olympian Michael Phelps in the qualifying heats for the Rio 2016 100m butterfly stroke semi-finals.

Schooling took first place, clocking in 51.41s, while Phelps came in second with a time of 51.60s.

Schooling went on to top the main event and made Singaporean history on Friday by becoming its first-ever male swimmer to qualify for an Olympic final.

The trio of Eddie Dawkins, Sam Webster and Ethan Mitchell were beaten by Great Britain by just over a 10th of a second in the final.

New Zealand finished with a time of 42.542 seconds with Great Britain ahead of them finishing with Olympic record time of 42.440 seconds.

New Zealand had easily overcome Germany in their heat in a new Olympic record time of 42.545 seconds.

E! News recently caught up with Alessandra Ambrosio at the Omega House's Gold Night celebration for medal-winning athletes in Rio, and when asked to weigh in who's the fiercest competitor between Olympians and Victoria's Secret models, she didn't hesitate to answer. 

"Well, you know we do work very hard, but the athletes. It's hours and hours and they give everything they can," the Brazilian beauty dished.