GB denied! Just like with their goal, Britain threaten from a penalty corner. Liam Sanford was in there, forcing a really sharp save from Eramus Pieterse.

British rider Charlotte Fry had a dream Olympic debut as she cruised into the individual dressage final.

The 25-year-old, whose late mother Laura rode for Britain in the 1992 Barcelona Olympics, topped her qualifying group with Everdale on a score of 77.096 per cent.

Two riders from each of six groups - plus the next six-best finishers - will contest Wednesday's individual final. And Fry's outstanding performance also meant a strong start to British team hopes, with Charlotte Dujardin and Carl Hester completing a powerful trio.

Image source, Getty Images

Simon Mason
Ex-GB Olympic hockey player on BBC TV

That was a really good, lively first quarter, though Great Britain have perhaps not utilised that high press as much as they would have liked.

South Africa are showing some real lively movement through the midfield channels and could make some territory if they can get in behind.

That's the end of the road for Britain's Peter McGrail who loses out to Thailand’s experienced Chatchai-Decha Butdee in the men's featherweight division.

Butdee, appearing in his third Olympics aged 36, used all his skills and was able to deal with everything the Commonwealth Games champion and two-time world bronze medallist from Merseyside threw at him.

Butdee took the first round 4-1 and the second 5-0 and although McGrail tried to find something in the final round, Butdee held strong to win on a unanimous points decision.

Levels, you devils. All square at the end of the first quarter.

There's been a change in the GB athletics team.

European 400m champion Matthew Hudson-Smith has pulled out of the Olympics on medical grounds (not Covid-19).

Joe Brier will take his place in the 4x400m relay squad.

Simon Mason
Ex-GB Olympic hockey player on BBC TV

Great Britain are utilising a high press. They will want to step forward and be aggressive, forcing South Africa all the way back.

That raw pace of South Africa shows they cannot be complacent though. The gap in the world rankings means absolutely nothing.

It's just whether they can maintain that physicality through the four quarters as it is still very hot here, despite being an evening start.

Five minutes left in the first quarter. GB have responded well to the equaliser. The game is being played in the South Africa half.

Great Britain women's football head coach Hege Riise has made four changes to the side which beat Chile.

Wales' Sophie Ingle comes into midfield, while Leah Williamson partners Steph Houghton at centre-back. Demi Stokes starts at left-back and Nikita Parris replaces Georgia Stanway in attack.

Notably for Japan, Arsenal midfielder Mana Iwabuchi is only on the bench.

Japan XI: Yamashita, Hayashi, Miyagawa, Hasegawa, Skiokoshi, Tanaka, Nakajima, Sugita, Minami, Kumagai (c), Shimizu.

Great Britain XI: Roebuck, Bronze, Houghton, Williamson, Stokes, Ingle, Walsh, Little (c), Hemp, Parris, White.

Some start, barely five minutes into the first of the four 15-minute quarters and we've already had two goals.

Goals might be the order of the day later, too...

The lead doesn't last long. South Africa draw level through Matthew Guise-Brown.

On the day of the first Lions Test...

Sam Ward is a name worth knowing.

In 2019 he was hit by a ball, suffering seven facial fractures and a torn retina. He returned to action three months later but still has some damage to his vision.

That didn't take long!

Great Britain lead after a second penalty corner. Sam Ward is the man who fires home from the edge of the D.

With the hockey just getting under way, I can tell you what has happened so far on this first official day of competition.

Tennis: Britain's Andy Murray and his partner Joe Salisbury are through to the second round of the men's doubles tennis, but Heather Watson is out of the women's singles.

Rowing: Helen Glover, the Olympic champion mum-of-three, has returned to the Games and made it through to the semi-finals of the women's pairs rowing with partner Polly Swann but suffered her first defeat in more than a decade.

Shooting: China's Yang Qian has won the first gold of the Games in the women's 10m air rifle.

Cycling: Ecuador's Richard Carapaz won gold in a thrilling men's road race. Adam Yates, in ninth, was the highest placed Briton.

On the subject of hockey, Great Britain's men are about to make their entry into these Games.

They take on a South Africa side that are the lowest-ranked of the six teams in Group B, but Britain themselves failed to get out of the group five years ago.

There are six teams in each, with the top four advancing to the knockouts.

Yeah, the cycling was dramatic, but I reckon this is my favourite moment of the day so far.

Take a look at the kerfuffle during the Argentina-Spain hockey...

British pair Jamie Murray and Neal Skupski complete the comeback to reach the second round in the men's doubles, beating Argentina's Andres Molteni and Horacio Zeballos 6-7 (3-7) 6-4 13-11 in a deciding set tie-break.

They lost the opening set and also faced match point in the decider, but the British seventh seeds come through in two hours, 11 minutes.

Steve Bunce
Commentator on BBC Radio 5 Live

As soon as Karriss Artingstall was hit she threw three punches back, sometimes she's overeager.

Lee Pullen in her corner pulled her back and he pulled her back brilliantly.

She calmed it down and she boxed.