Tokyo 2020 Day 13: All the gold medals Australian teen win's men's park skateboarding

27 medals up for grabs on Day 13 of the Olympic Games

TOKYO, JAPAN - AUGUST 05: Gold medalist Emmanuel Kipkurui Korir of Team Kenya poses during the medal ceremony for the Men's 800m Final.

Sandor Totka, of Hungary, reacts after finish first in men's kayak single 200m final A to win the gold medal at the 2020 Summer Olympics.

Hansle Parchment of Jamaica reacts after winning the gold medal in the men's 110m hurdles.

Gold medalist Hansle Parchment of Team Jamaica, bronze medalist Ronald Levy of Team Jamaica and silver medalist Grant Holloway of Team United States compete in the Men's 110m Hurdles Final.

Germany's Florian Wellbrock celebrates after finishing first to take the gold medal in the men's 10km marathon swimming event.

Florian Wellbrock, of Germany, holds up his gold medal during a victory ceremony for the men's marathon swimming event at the 2020 Summer Olympics.

Florian Wellbrock of Team Germany.

Gold medalist Florian Wellbrock of Team Germany, centre, silver medalist Kristof Rasovszky of Team Hungary, left, and bronze medalist Gregorio Paltrinieri of Team Italy pose after the Men's 10km Marathon Swimming.

Gold medalist Wojciech Nowicki, centre, of Poland, silver medalist Eivind Henriksen, left, of Norway and bronze medalist Pawel Fajdek of Poland during the medal ceremony for the men's Hammer Throw.

Ryan Crouser of the United States competes en route to winning the men's shot put final at the Tokyo Olympics.

Ryan Crouser, of United States, holds a sign while celebrating winning the gold medal in the final of the men's shot put with his father and coach, Mitch Crouser, at the 2020 Summer Olympics.

Ryan Crouser, of United States, holds a sign while celebrating winning the gold medal in the final of the men's shot put.

Keegan Palmer of Australia competes during the Men's Park Skateboarding Finals at the Tokyo 2020 Olympic Games at the Ariake Urban Sports Park.

Silver medalist Pedro Barros of Brazil, gold medalist Keegan Palmer of Australia and bronze medalist Cory Juneau of the USA show their medals during the Men's Park Skateboarding Finals awarding ceremony.

Gold medalist Nevin Harrison of Team United States celebrates at the medal ceremony following the Women's Canoe Single 200m Final.

Gold medalist Sandor Totka of Team Hungary celebrates at the medal ceremony following the Men's Kayak Single 200m Final.

Jean van der Westhuyzen and Thomas Green of Team Australia celebrate winning the gold medal following the Men's Kayak Double 1,000m Final.

Silver medalist Max Hoff and Jacob Schopf of Team Germany, gold medalists Jean van der Westhuyzen and Thomas Green of Team Australia and bronze medalists Josef Dostal and Radek Slouf of Team Czech Republic celebrate at the medal ceremony following the Men's Kayak Double 1000m Final.

From left: silver medalist Koki Ikeda of Team Japan, gold medalist Massimo Stano of Team Italy and bronze medalist Toshikazu Yamanishi of Team Japan pose during the medal ceremony for the Men's 20km Race Walk.

Gold medalist Albert Batyrgaziev of the Russian Olympic Committee at an award ceremony for the men's featherweight (52-57kg) boxing at the 2020 Summer Olympic Games.

Gold medalist Matthew Walls of Team Great Britain poses while holding the flag of his country during the medal ceremony after the Men's Omnium points race.

Great Britain's Matthew Walls celebrates gold in the Men's Omnium Points Race.

Gold medallist Shanne Braspennincx of Netherlands poses with her medal after the women's track cycling keirin final.

Gold medallist Pedro Pichardo of Portugal poses with his medal on the podium after the men's triple jump event.

Gold medalist Pedro Pichardo (C) of Portugal, silver medalist Zhu Yaming (L) of China and bronze medalist Hugues Fabrice Zango of Burkina Faso during the medal ceremony.

From left: Silver medalist Kenneth Bednarek of Team United States, gold medalist Andre De Grasse of Team Canada and bronze medalist Noah Lyles of Team United States pose with their for the 400m Final medal ceremony.

Gold medallist in the men's 200m final, Andre De Grasse of Canada, poses as he celebrates on the podium REUTERS / Dylan Martinez

Day 13 of the Tokyo Olympics and we have already witnessed the "unbeatable" Florian Wellbrock power to gold in the men's 10km marathon swimming competition.

The German set the pace early on and holding his lead all the way to the finish.

Wellbrock, who claimed bronze in the men's 1,500m freestyle swimming event, finished in a time of 1 hour, 48 minutes, 33.7 seconds, more than 25 seconds ahead of Hungary's Kristof Rasovszky. Italian Gregorio Paltrinieri claimed bronze.

Rasovszky, who said he had trained in tough conditions to prepare for the Games, conceded he had no chance of catching Wellbrock.

"Florian was unbeatable today," he said. "I tried to be the best of the rest."

Flying Australian teen Keegan Palmer claimed the inaugural men's park skateboarding Olympic gold medal in stunning fashion with two giant scores in the final on Thursday.

Palmer, 18, threw down the gauntlet with 94.04 points in his first run before incredibly bettering his score to 95.83 in his third and final routine.

"I put in a lot of hard work over the last couple of years," said Palmer.

"It paid off today and I'm so grateful to be able to bring the gold back to Australia. It means the world to me because that's where it all started."

The San Diego-based Aussie pulled some huge airs at Ariake Urban Sports Park and he finished well clear of Brazilian silver medallist Pedro Barrios's 86.14 and America's Cory Juneau, who claimed bronze with 84.13.

"I just went in planning to put down a solid run in the first run, and then work on making it better if I needed to," said Palmer.

"I can't believe I'm here now. I put a lot of hard work into that one run and it paid off."

American Heimana Reynolds, the world number one and reigning world champion, did not reach the final after failing to complete any of his three rides in qualifying.

Grant Holloway of the United States took the silver medal while Ronald Levy of Jamaica won the bronze.

The United States failed to make the Olympic men's 4x100 metres relay final after a ragged run saw them finish a shock sixth in their semi-final on Thursday.

The US team featured two of the individual 100m finalists, Fred Kerley and Ronnie Baker, the world leader Trayvon Bromell, and Cravon Gillespie, who also ran the heats en route to their 2019 world championship-winning team.

But despite the depth of talent on show, a shocking second changeover saw them lose all momentum and Gillespie was unable to run them back into contention in a mass finish, with China the surprise heat winners in 37.92.

Canada were second, two thousandths of a second behind, and Italy, helped by newly-crowned individual champion Lamont Marcell Jacobs, posted a national record 37.95 to also advance.

Jamaica led the way in the other semi, qualifying fastest in 37.82, ahead of Britain (38.02) and Japan (38.16)

After dominating the event for decades, a succession of disqualifications contributed to the United States not managing gold since 2000 and this is the latest setback in what has been a considerably below-par performance in Tokyo for the male side of the sport's traditionally most powerful nation.