Frazer Clarke defeated Tsotne Rogava with power and precise punches as Team GB's super-heavyweight ended a wait of over 10 years for his Olympic debut.
Brazil advanced to the quarter-finals in the men's Olympic football tournament with a 3-1 win over Saudi Arabia, while 2016 silver medalists Germany were knocked out.
An Olympic medal would hold even greater significance for two of the golfers in action in Tokyo, with anything less having career-changing consequences.
Charlotte Dujardin became Great Britain's most decorated female Olympian as she claimed bronze in the individual dressage aboard Gio at the Tokyo Games.
Man City goalkeeper Karen Bardsley has revealed the "gut-wrenching" devastation she felt at being forced to withdraw from the Great Britain squad for the Tokyo Olympics.
With Damian Lillard's 21 points, Team USA rolled to a 120-66 victory over Iran to rebound from an opening loss to France.
Fiji defended their 2016 Olympic title with a hard-fought 27-12 win over New Zealand to claim their second Olympic gold medal.
Simone Biles has withdrawn from Thursday's women's individual all-around final at the Tokyo Olympics "to focus on her mental health", USA Gymnastics has announced.
Andy Murray's hopes of a fourth Olympic medal are over after he and partner Joe Salisbury lost in the men's doubles quarter-finals in Tokyo.
Karriss Artingstall guarantees Team GB's first boxing medal of Tokyo 2020 - Lauren Price and Ben Whittaker also shine.
Tom Dean became the first British male swimmer to win more than one gold medal at a Games in 113 years after helping secure victory in the 4x200m freestyle relay.
Great Britain's run of five successive Olympic golds in the men's four came to an end before a surprise silver in the quadruple sculls lifted spirits for British Rowing.
Wednesday will be a bumper Olympic day with 22 medal events taking place and many Team GB athletes in action, including the men's hockey and rugby sevens teams.
Simone Biles says she is not injured and withdrew from the gymnastics women's team final at the Tokyo Olympics to "protect" her mental health.
Olympic boxer Youness Baalla bites opponent David Nyika in a moment similar to Mike Tyson's infamous incident.
Team GB's women's gymnastics team have won a bronze medal in the final of the team event at the Tokyo 2020 Olympics.
Caroline Weir's late deflected strike secured Great Britain top spot in Group E of the Olympic women's football tournament after a 1-1 draw with Canada.
Great Britain's Bianca Walkden took bronze in the women's +67kg Taekwondo with a 7-3 victory over Poland's Aleksandra Kowalczuk.
Reigning Olympic gymnastics champion Simone Biles was forced to withdraw from the team finals because of a "medical issue".
Great Britain kept their Olympic hopes alive as they beat the United States 26-21 for a place in the semi-finals.
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