Host nation Japan remain top of the Olympic Games medal table, one gold medal clear of the United States and China, thanks to another two gold medals on Tuesday in Tokyo.

Japan now have 10 golds at the Games, five of which have come in Judo, despite home favourite Naomi Osaka crashing out to Czech world number 42 Marketa Vondrousova in the women's singles tennis.

The USA extended their gold medal count to nine, with 17-year-old Lydia Jacoby stealing the headlines courtesy of gold in the 100m breaststroke – their third in the pool so far – though they had to settle for silver in softball as they lost to table-toppers Japan.

China, who have dominated the shooting to win eight medals in nine events, picked up three more golds with success in the 10m air pistol mixed event, the 10m air rifle mixed event and the women's 10m synchronised platform - their second diving gold in Tokyo.

The Russian Olympic Committee remain fourth with seven golds after winning the day's big event, the women's team artistic gymnastics, but that was overshadowed due to American Simone Biles withdrawing due to concerns over her mental health.

The Russians surprised in the pool, too, with Evgeny Rylov claiming 100m backstroke gold that forced defending Olympic champion Ryan Murphy to settle for bronze – that result represented the USA's first backstroke defeat since the 1992 Barcelona games.

After team-mate Adam Peaty's call for a British gold surge, Tom Dean and Duncan Scott made history by winning the first British swimming one-two since 1908 in the 200m freestyle.

Dean and Scott's swimming achievements capped a positive day for Great Britain that saw them collect six medals in total to stay in fifth place.

Meanwhile, Flora Duffy made history for Bermuda with gold in the women's triathlon as the tiny Caribbean island became the smallest country to ever win Gold at the Summer Games.

Japanese superstar Naomi Osaka crashed out of the Tokyo Olympics tennis with a 6-1 6-4 defeat to Czech world number 42 Marketa Vondrousova.

Osaka, who lit the flame at Friday's opening ceremony, had won her opening two matches but bowed out in straight sets, with Vondrousova reaching the quarter-finals.

In the first set, Vondrousova dominated on her first serve and broke three times, before the Japanese hit back with an early break in the second. But the Czech fought back to win, with Osaka finishing with 32 unforced errors to just 10 by her opponent.

"Of course it's one of the biggest wins of my career," Vondrousova said. "Naomi is a great player, she has so many grand slams, so I knew it would be a tough match. I'm very happy with my play. I played amazingly in the first set, and then the second set was really tough. I'm just happy to be through."

World number two Osaka joins top seed and Wimbledon champion Ash Barty in being eliminated early at the Tokyo Games.

In the men's singles second round, fourth-ranked Greek Stefanos Tsitsipas eased past American Francis Tiafoe 6-3 6-4, avenging a shock Wimbledon defeat.

DUFFY DELIGHT

Flora Duffy won Bermuda's first-ever Olympic gold medal with victory in the women's triathlon on Tuesday at Odaiba Marine Park.

The four-time Olympian failed to finish in Beijing, came 45th in London and improved to eighth in Rio de Janeiro.

Duffy took the Tokyo title in a time of one hour, 55 minutes and 36 seconds, finishing more than a minute ahead of Britain's Georgia Taylor-Brown who took silver, with USA's Katie Zaferes claiming bronze.

“It's always been my dream to race at the Olympics and be a professional athlete with the goal of being an Olympic champion," Duffy said.

"That's not the easiest thing to do regardless of where you're from. Bermuda is a small country, but it's really passionate about its sport.

“I'm so grateful that I could achieve a personal dream here of winning an Olympic medal, but this is bigger than me, this is going to inspire the youth of Bermuda and everyone back home that competing on the world stage from a small island is really possible."

The 33-year-old broke clear in a group of seven early in the bike stage, before dominating the 10km run.

Bermuda, which has a population of just over 70,000, had only claimed one medal previously in Olympic history, a bronze in 1976.

MCKEOWN BREAKS OLYMPIC RECORD

Australia secured a second gold medal in the pool as Kaylee McKeown broke the Olympic record in the women's 100m backstroke.

McKeown won in 57.47, finishing ahead of Canada's Kylie Masse by 0.25 seconds, with USA's Regan Smith taking bronze. Masse had led at the turn.

In the men's 100m backstroke, Russian Olympic Committee claimed a one-two finish as Evgeny Rylov edged out countryman Kliment Kolesnikov, who holds the 50m world record. Ryan Murphy, who is the world record holder across 100m, claimed bronze.

Great Britain's Tom Dean won the men's 200m freestyle by 0.04, marginally ahead of compatriot Duncan Scott, with Brazil's Fernando Scheffer coming in third. The result meant two British male swimmers stood on the same Olympic podium for the first time since 1908.

World record holder Lilly King finished third as US teenager Lydia Jacoby triumphed in the women's 50m breaststroke. South Africa's Tatjana Schoenmaker claimed silver.

CHINESE PAIR ON TARGET

China claimed another gold medal in the final of the 10m air pistol mixed team at the Asaka Shooting Range.

China's Ranxin Jiang and Wei Pang won 16-14 over Russian Olympic Committee pair Vitalina Batsarashkina and Artem Chernousov.

Ukraine duo Olena Kostevych and Oleh Omelchuk won the bronze by beating Serbia.

The 10m air rifle mixed team bronze and gold medal matches were taking place later on Tuesday.

AUSSIES SINGING IN MEN'S HOCKEY

World number two side Australia knocked off reigning Olympic gold medallists Argentina 5-2 in the men's hockey group stage.

Australia claimed their third consecutive victory and top Group A, this time being aided by two goals from Blake Govers.

The Kookaburras have only won one Olympic gold despite often being a dominant side in men's hockey and are one of the favourites to triumph in Tokyo.

Japan and New Zealand, who both previously lost to Australia, drew 2-2 in the other Group A game.

In Group B, world number four India won 3-0 over Spain, while fifth-ranked Germany beat Great Britain 5-1.

Another superb day for Japan saw the host nation surge to the top of the medal table at the Tokyo Olympic Games on Monday.

Japan now have eight golds after winning Olympic titles in three different sports, the most unexpected of which came in table tennis.

The mixed doubles team of Jun Mizutani and Mima Ito came from two games down to eventually prevail after seven games against China's Xu Xin and Liu Shiwen.

China won all four table tennis titles at Rio 2016 and had been expected to dominate again, only to come unstuck as Japan won the first gold in this new event.

Further joy for Japan came as 13-year-old Momiji Nishiya triumphed in the women's street skateboarding while Shohei Ono was victorious in the men's 73kg category in judo.

Second behind Japan are the United States, who took two shooting golds on day three as well as the men's 4x100m freestyle title in the pool.

China did not add to their tally of six gold medals, one fewer than the USA, having come up short in another event where they had a team of heavy favourites.

Cao Yuan and Chen Aisen were edged out in the men's 10m synchronised platform, with British divers Tom Daley and Matty Lee winning gold.

That was one of three golds for Great Britain, who moved up to fifth in the medal table thanks also to Adam Peaty retaining his 100m breaststroke title and Tom Pidcock dominating in the men's cross-country mountain bike race.

The Russian Olympic Committee sits fourth after adding three golds, the headliner being victory in the men's artistic gymnastics team all-around final. 

Meanwhile, Hidilyn Diaz made history for the Philippines, become the country's first Olympic gold medallist by prevailing in the women's 55kg weightlifting.

Tunisian teenager Ahmed Hafnaoui admits he surprised even himself with his men's 400m freestyle gold medal victory at the 2020 Tokyo Olympics on Sunday.

Hafnaoui, who turned 18 in December, stormed home from lane eight to win the gold in a major shock, ahead of Australia's Jack McLoughlin and USA's Kieran Smith.

The 18-year-old's time of 3:43:36 beat his personal best by almost three seconds, while bettering his prelims time by two seconds.

"Of course I was surprised with myself. It's unbelievable," Hafnaoui said at the news conference.

"I believe when I touched the wall and I saw myself first. I was so surprised."

Hafnaoui was only the second Tunisian to ever make an Olympic swimming final and claimed his country's second medal in the pool.

"I was in tears, I was in tears in my eyes because when I see the flag of my country and I hear the anthem in the background, it was great," he said. "I’m so proud of it."

Australian quartet Bronte Campbell, Meg Harris, Emma McKeon and Cate Campbell broke the world record as they won gold in the women's 4x100m freestyle relay.

Anchored by Cate Campbell, the Aussies won in 3:29:69 ahead of Canada and the USA. It was Australia's first goal medal of the Tokyo Games.

The USA's Chase Kalisz won the men's 400m individual medley, while Japan's Yui Ohashi triumphed in the women's equivalent.

Top seed Barty bundled out, Osaka cruises

Spain's Sara Sorribes Tormo stunned 2021 Wimbledon champion Ashleigh Barty in straight sets in the first round of the women's tennis singles.

Sorribes Tormo won 6-4 6-3 over the Australian, the world number one missing out on a first Olympic medal having looked well below her best.

The Spaniard controlled the baseline, while Barty only managed to land 42 per cent of her first serves.

Second seed Naomi Osaka cruised past Zheng Saisai 6-1 6-4 in her Olympic debut, returning to the court in style following a hiatus after her French Open withdrawal.

Third seed Aryna Sabalenka had no trouble dispatching Poland's Magda Linette 6-2 6-1.

Men's fourth seed Alexander Zverev eased past Lu Yen-hsun 6-1 6-3.

First-ever skateboarding gold

Skateboarding made its Olympic debut on Sunday, with local Yuto Horigome crowned the sport's first gold medallist in the men's street event.

World number two Horigome qualified in the semi-finals in sixth after scores totalling 33.75 but dominated the final with 37.18.

The Japanese finished ahead of Brazil's Kelvin Hoeffler with 36.15 and Jagger Eaton on 35.35.

Horigome landed three huge tricks in a row in the final, while American favourite Nyjah Huston stumbled down to seventh after four straight falls.

Olympic record in shooting final

Vitalina Batsarashkina won gold in the women's 10 metre air pistol shooting ahead of Bulgaria's Antoaenta Kostadinova and China's Jiang Ranxin.

The Russian tallied an Olympic record 240.3 points, finishing marginally ahead of Kostadinova on 239.4.

"I did not set a goal to win or to get into the top three or even into the final," she said. "I just set the goal to shoot like I can, to show everything that I can."

Chinese gold in diving

China won gold in the women's synchronized 3m springboard diving as Shi Tingmao and Wang Han edged out Canada and Germany.

The Chinese duo scored 76.5 with their last dive to tally 326.4 points and win China's fourth gold medal at the Tokyo Games.

The reigning world champions were well ahead of the pack, with Canadian pair Jennifer Abel and Melissa Citrini-Beaulieu grabbing silver with 300.78. Germany's Lena Hentschel and Tina Punzel claimed the bronze with 284.97.

The gold was Shi's third, having won the individual 3m platform title and this event with Wu Minxia in 2016.

China lead the way with four medals after the opening day of the Olympics, as Richard Carapaz doubled Ecuador's all-time tally of golds in Tokyo.

Yang Qian was the first athlete to strike gold in the Japanese capital, winning the women's 10-metre air rifle competition for China.

Sun Yiwen also claimed a gold medal for China in the women's epee individual fencing event, while compatriot Hou Zhihui came out on top with an Olympic record in the women's 49kg weightlifting.

Pang Wei claimed China's other medal on the opening day, taking bronze in the men's 10m air pistol event.

Carapaz produced a sensational ride to win the men's road race title, becoming the second athlete from Ecuador to win an Olympic gold medal.

Host nation Japan and Italy are joint-second in the medal table with a gold and a silver apiece.

There were three medals for South Korea, including a triumph for Kim Je Deok and An San in the first mixed team archery event.

The United States remain notably absent from the primitive medal table, though, having ended the first day of the Games without a medal for the first time since Munich 1972.

Nina Christen of Switzerland finished 16th in the 10-metre air rifle at the Rio Olympics, but she became a footnote to history five years later as the first athlete to secure a medal at Tokyo 2020.

The 27-year-old locked up the bronze medal several minutes before China's Yang Qian beat Anastasiia Galashina of the Russian Olympic Committee to take gold in the first medal event of the Games.

As soon as she was eliminated from contention for the final two, Christen flashed a smile and waved, knowing she had at least won a spot on the podium this time – no small feat on this stage.

After the first medal ceremony of the Tokyo Games, she spoke about the pressure as the competition entered the final rounds.

"You just try to not reach your head out for the medal before you have the medal," Christen said. "That is the worst thing you could do. Having in your mind, 'Oh I could win a medal, or I could be eighth which would be a failure'.

"So you just try not to think about both of them, you just try and think about what your job is like breathing, holding, aiming, balance, triggering, and then follow through.

"It helps to not think about what is behind you and obviously there are a lot of cameras and a lot of people. And it would be even more if COVID would not have hit. So yeah that is the thing you have to do, otherwise you would just crack."

Sixth seed Swiatek rolls in tennis opener

Two seeded players enjoyed easy victories in the women's singles draw as play began at the Ariake Tennis Park.

Sixth-seeded Iga Swiatek of Poland, the 2020 French Open champion, cruised past Germany's Mona Barthel 6-2 6-2 to open her first Olympics.

Anastasia Pavlyuchenkova, the 11th seed representing the Russian Olympic Committee, had an even easier time in a 6-0 6-1 rout of Italy's Sara Errani.

Pavlyuchenkova will face Germany's Anna-Lena Friedsam, who upset Great Britain's Heather Watson 7-6 6-3 in another early match.

In doubles, there was an eye-catching result for Britain's Andy Murray and Joe Salisbury, who took out French second seeds Pierre-Hugues Herbert and Nicolas Mahut, scoring a 6-3 6-2 victory.

Men's gymnastics gets under way

Nikita Nagornyy turned in the strongest showing in the opening group as men's gymnastics got under way.

Nagornyy, who won the all-around at the 2019 World Championships and was part of Russia's silver medal-winning team at Rio 2016, posted an 87.897 to lead subdivision one, which included gymnasts from the Russian Olympic Committee (ROC), China, Ukraine and Spain along with individuals from other nations.

But his showing was not enough to put the Russians on top, as China earned the top score in the group with a 262.061 to the ROC's 261.945. The top eight ranked teams qualify for the team final, with two subdivisions still to compete Saturday.

"I don't think our team was really good today, but we made our best effort," Nagronyy said. "We have a lot to do."

Brazilians start strongly on the beach

Brazil's two returning beach volleyball medallists are off to a strong start five years later.

Alison Cerutti won gold in Rio and is teamed with new partner Alvaro Morais Filho for Tokyo. They won their opening match 2-0 against Argentina's Nicolas Capogrosso and Julian Amado Azaad.

On the women's side, Rio silver medallist Agatha Bednarczuk, also with a new partner in Eduarda Santos Lisboa, won by the same score against Ana Gallay and Fernanda Pereyra of Argentina.

While she was happy to advance, Agatha found the difference between Rio's raucous crowds and Tokyo's COVID-driven quiet jarring.

"It's so different. In Brazil we have the biggest support there. Many, many people cheering for us, and here, it's silence," she said.

"Here we need to put our emotion (aside) because we don't receive the emotion from the people. For me, this is very important because I like to play with emotions."

Yang Qian is the first gold medallist at Tokyo 2020. 

The Chinese shooter won the women's 10-metre air rifle despite saving her worst shot of the competition for last. 

The 21-year-old trailed Anastasiia Galashina, competing for the Russian Olympic Committee, by 0.2 points entering the final shot at the Asaka Shooting Range, but Galashina missed badly, scoring 8.9. 

Yang had scored at least 10 points on every shot up to her last, but her 9.8 was still enough to take gold with an Olympic record 251.8 as Galashina finished with 251.1. 

Nina Christen of Switzerland took bronze with a final score of 230.6.

Jamaica’s Isaac Mair has described his B Class victory at the Florida State Championships this past weekend as 'the sweetest' of his wins this year.

Craig Simpson defeated defending champion Christian Sasso via long run to win the David East Memorial Sporting Clays on Sunday. Meanwhile, Aliana McMaster dethroned her mother, Wendy, to take the women’s title.

Three-time national shotgun champion Christian Sasso and four-time national female champion Wendy McMaster are eager to take to the course their respective rivals today at the David East Memorial Shoot at the picturesque Murphy Hill Estate which overlooks the town of Ocho Rios in St Ann.

Sasso, however confident, will have to look out for his rivals, who include six-time national champion Shaun Barnes as well as Ray McMaster, Craig Simpson and Robert Yap Foo.

The Ladies section also promises to be competitive with McMaster expecting to be challenged by her daughter Aliana, Marguerite Harris and Renee Rickhi.

Mention must be made of the Juniors who have been posting wins against some of the island’s top shooters.  Juniors such as Danzell Knight, Mark Desnoes, JJ Ralston and David Wong are expected to be engaged in heated battle throughout the day.

The shooters will compete in various classes including A-E, Junior A-D, Sub-Junior, Ladies and Hunters or beginners.

Due to the ongoing pandemic, there will be a number of changes to the 2021 staging of the tournament. The usual two-day event will now be held in one day in order to reduce the contact time among the shooters.

There will be no hospitality on the course and no after-shoot prize-giving lyme. The wearing of masks will be mandatory and shooters will be subjected to temperature checks on entering the venue.

There will also be no shooters briefings and fewer shooters will be allowed on the course at any one time.  This means that there will be two start times (9:30 am and 1:30 pm), which will lead to a longer day overall but makes for easier social distancing with fewer shooters on the course.