American Simone Biles put in a sparkling performance to win the women's all-around final and claim the second of a potential five gold medals at Rio 2016 on Thursday.
Michael Phelps took his Olympic gold-medal tally to 22 as he thrashed the field in the 200-metre individual medley, while Team USA's Simone Manuel triumphed in the 100-metre freestyle, sharing gold with Canada's Penny Oleksiak after a dead-heat finish.
History was made in the men's rugby sevens as Fiji won gold to claim their country's first-ever Olympic medal, and Great Britain triumphed in the men's team sprint as the track cycling got under way at the Rio Olympic Velodrome.
Friday sees the start of the athletics at the 2016 Games, while there will also be medals up for grabs in archery, boxing, cycling, dressage, fencing, judo, rowing, shooting, swimming, tennis, gymnastics and weightlifting.
Here's how things stand in the medal table:
Biles, 19, lived up to her billing as the hot favourite in the all-around, as she combined fantastic performances on vault, floor and beam to finish with a score of 62.198.
In a sport where winning margins are usually infinitesimal, Biles' 2.1 final lead ahead of teammate and silver medallist Aly Raisman was remarkable, per NBC:
Phelps also put all his competitors in the shade in the 200-metre individual medley, as he finished almost two seconds clear of Japan's Kosuke Hagino in second and became the first swimmer ever to win four successive golds in the same event, per BBC Sport.
The American also broke a 2,168-year-old record, as he claimed his 13th individual gold medal at the Olympics, per Bleacher Report:
He was not the only athlete breaking new ground on Thursday, though.
Manuel's gold medal—she and 16-year-old Oleksiak finished the women's 100-metre freestyle in 52.70—was similarly historic, per Bleacher Report UK:
The 20-year-old Texan said she hopes her win will inspire others, per the Associated Press (via NBCOlympics.com):
I hope that I can be an inspiration to others, so this medal is for the people who come behind me and get into the sport and hopefully find love and drive to get to this point. ...
I think that this win helps bring hope and change to some of the issues that are going on in the world, but I mean, I went out there and swam as fast as I could and my colour just comes with the territory.
Fiji thrashed Great Britain, 43-7, in the men's sevens final to earn a first-ever Olympic medal for their country in the most emphatic and glorious fashion.
The triumph sparked wild celebrations in the South Pacific nation, with the government declaring a national holiday for August 22 to mark the win, per
The 40-year-old Scotswoman's path to Rio 2016 has been so tough after she opted to come out of retirement to go for a fifth Olympic medal that she named her Thursday silver as her best achievement, per SportingIntelligence.com:
For many, the Olympics don't really get going until the track and field events start, and the first athletics medals are on offer on Friday in the women's 10,000 metres and men's 20-kilometre walk.
It is also the penultimate day of the swimming events, and American Katie Ledecky will be aiming to complete a freestyle treble by adding gold in the 800-metre event to her 200 and 400 triumphs.