By Joshua Berlinger, Aditi Sangal and Adam Renton, CNN
From CNN's Wayne Sterling
In her Olympic debut, American Valarie Allman won the gold medal in women's discus at the 2020 Tokyo Olympics with a throw of 68.98 meters on her first attempt.
This is the first gold in this Olympics for US Track and Field.
The US secures its 22nd gold medal of the Summer Games and the nation's 64th overall.
Germany's Kristin Pudenz threw a personal best 66.86 meters to take silver and Cuba's Yaime Perez earned bronze with 65.72 meters.
From CNN’s Aleks Klosok
China’s Li Wenwen posted a series of new Olympic records on the way to a dominant gold in the +87kg weightlifting category on Monday.
The 21-year-old set an Olympic record in the snatch (140kg) and clean and jerk (180kg) to post a new Olympic record total of 320kg.
Emily Campbell became the first British woman to win an Olympic weightlifting medal with silver, posting a total of 283kg, with United States’ Sarah Robles taking bronze with a total of 282kg.
From CNN's Matias Grez in London
Sifan Hassan obliterated the rest of the field to win gold in the women's 5000 meter final and complete the first leg of her historic treble attempt.
The Dutch runner is aiming to become the first athlete in Olympic history to win the 1500 meter, 5000 meter and 10000 meter gold at a single Games.
Hassan broke away from her competitors on the final lap and never looked like she was in trouble, finishing almost two seconds ahead of Kenya's Hellen Obiri in second to claim her first Olympic title.
Ethiopia's Gudaf Tsegay clinched the bronze medal.
Hassan also becomes the first Dutchwoman to win an Olympic medal in a long distance event.
It's been an action-packed day for Hassan, who fell earlier on Monday in the 1500 meter heats and had to make up more than 20 meters on the field before eventually winning the race.
"I can't believe it. I used all my energy this morning and I was kind of tired," she said after winning gold. "I couldn't believe what happened. It was terrible when I tripped.
"I felt terrible afterwards and I never thought I am going to be Olympic champion.
"It has been an amazing day. When I fell down and had to jump up, I felt like I was using so much energy. I couldn't believe the feelings in my legs. All the energy seemed to leave me.
Before the race here, I didn't even care. I was so tired. Without coffee, I would never be Olympic champion. I needed all the caffeine.
"I was so scared I wasn't going to do it."
From CNN's Wayne Sterling
Moroccan Soufiane El Bakkali won the men's 3000-meter steeplechase gold in 8:08.90 at the 2020 Tokyo Olympics. El Bakkali finished fourth in this competition at the 2016 Rio Games
The 25-year-old becomes the second man to win an Olympic medal for Morocco in this competition – after Ali Ezzine won bronze in 2000.
Ethiopia's Lamecha Girma took silver and Kenyan Benjamin Kigen earned bronze.
Kenya was looking to win the men's 3000m steeplechase for the 10th straight time.
From CNN’s Aleks Klosok
Sweden will meet Canada in the women’s football gold medal match after a 1-0 semifinal victory over Australia on Monday.
Striker Fridolina Rolfo struck the decisive winner in the 46th minute to send Sweden into their second successive final.
Sweden will bid to go one step better than the 2016 Games when they lost 2-1 to Germany in the final.
Australia will face the United States in Thursday’s bronze medal match.
From CNN’s Aleks Klosok in London
The International Olympic Committee (IOC) has affirmed that “sport is something for all people, it is inclusive, accessible," said New Zealand’s Laurel Hubbard, the first out transgender woman to compete at an Olympics.
She also thanked the International Weightlifting Federation.
“They have been extraordinarily supportive. I think that they, too, have shown that weightlifting is an activity that's open to all the people of the world," she said after the event.
The 43-year-old said she is not "entirely aware" of the controversy surrounding her participation.
Some background: Hubbard has been eligible to compete in the Olympics since 2015, when the IOC issued new guidelines allowing qualifying women to compete in women's events provided their testosterone levels are below 10 nanomoles per liter for at least 12 months before their first competition.
From CNN’s Aleks Klosok in London
World record holder and defending 400 meters Olympic champion Wayde Van Niekerk won’t defend his title at the Tokyo Games after finishing fifth in the 400m semi-finals on Monday.
The South African needed to run 44.62 seconds to make Friday’s final as a fastest loser but could only manage a time of 45.14 seconds.
Botswana’s Isaac Makwala and the Netherlands’ Liemarvin Bonevacia will go through to Friday’s final as the two fastest losers, having qualified with times of 44.59 and 44.62 respectively.
Makwala and Bonevacia will join the three semi-final winners and runners-up.
Van Niekerk had set the world and Olympic record in the 400m at the 2016 Games in Rio with a blistering time of 43.03 seconds.
From CNN’s Aleks Klosok in London
New Zealand weightlifter Laurel Hubbard became the first-ever out transgender woman to compete in the 125-year history of the modern Olympics when she took part in the women’s super-heavyweight +87kg category on Monday in Japan.
Hubbard failed in all three of her attempts in the snatch, ending her bid for a medal. She was up against nine other athletes in the competition, with China’s world record holder, Li Wenwen, the favorite to win gold.
Hubbard competed in men’s weightlifting competitions before coming out in 2013.
Some background: She has been eligible to compete in the Olympics since 2015, when the International Olympic Committee (IOC) issued new guidelines allowing qualifying women to compete in women's events provided their testosterone levels are below 10 nanomoles per liter for at least 12 months before their first competition.
There is debate in the scientific community as to whether androgenic hormones like testosterone are useful markers of athletic advantage.
Supporters of Hubbard's inclusion at the Games have welcomed the decision as a sign of respect for fundamental human rights, while critics have questioned the fairness of transgender women competing against cisgender women.
In 2018, Australia’s weightlifting federation sought to block her from competing at the Commonwealth Games on the Gold Coast, but organizers rejected the move.
Meanwhile: Hubbard is the first transgender woman to compete in the Games, but she is the second transgender athlete. Hubbard's entry in the history books comes alongside Canadian footballer Quinn, who is the first trans and non-binary athlete to compete in the Olympics. Quinn is also the first trans athlete who is guaranteed a medal at Tokyo 2020 after Canada's semifinal win over the US on Monday.
From CNN's Wayne Sterling
South Korea's Shin Jea-hwan has won the gold medal in gymnastics men's vault, earning the country's second ever gold in this event after Yang Hak-seon won at the 2012 London Games.
Denis Ablyazin of the Russian Olympic Committee took silver to become the second gymnast to win three medals in the men's vault.
Bronze went to Armenian Artur Davtyan, who won Armenia's first Olympic medal in artistic gymnastics.
