The 100m hurdles and the high jump have been checked off the to-do list by Katarina Johnson-Thompson but there is still a long way to go in this women's heptathlon competition.

Catch-up with how the 31-year-old got on in the morning session's two events below.

Laura Muir was just hanging back at the rear of the field before deciding to up the pace and shifting herself to the front of the queue.

The Tokyo silver medallist leads as the bell rings...

Harry Poole
BBC Sport in Paris

Both Georgia Bell and Laura Muir race in the first women's 1500m semi-final, and they come in with very different levels of experience.

While Muir is competing at her third Games, this is Bell's first after she only returned to running following the coronavirus pandemic.

Watching the Tokyo Olympics from the comfort of home, contemplating what might have been, Georgia Bell could not have foreseen the journey ahead.

It was only three years ago, around the time of the Tokyo Games, that she began to enjoy running again. By that point, her spikes had gone unused for four years.

But she is now a European silver medallist, despite still working full-time in cyber security, and secured her Olympic qualification in style by beating two-time global medallist Muir to the British 1500m title.

"When I quit after college it was just so clear I hadn’t reached my full potential and it wasn't a happy ending. There was something left but I thought it would always be that way," Bell told BBC Sport earlier this year.

"I just didn’t know journeys like this existed."

Image source, Getty Images

BBC iPlayer

Athletics fans, head over to iPlayer for the beginning of tonight's action. Cycling fans, stay on BBC Two!

Athletics events under way are the women's 1500m semi-finals and the women's shot put in the heptathlon.

Kenyan world record holder Faith Kipyegon - who is also the Olympic record holder in the women's 1500m - is in the first semi-final along with GB's Laura Muir and Georgia Bell.

The final is on Saturday; only the top six go through.

Off you go!

BBC Radio 5 Live

Britain's Katy Marchant has spoken to BBC Radio 5 Live after finishing fourth in the women's keirin final and said: "It still feels really good you know. Monday was an absolutely spectacular day and a feeling that is going to live with me for a very long time.

"To bottle all that up and go race yesterday and today in the keirin making the final, it hurts but I can't be too disappointed."

Marchant then spoke about her son Arthur and added: "He's very special and close to my heart. It's been an absolute journey, in the last two years he has taught me so much and I've been able to take that into racing."

Jack Carlin had thought he was out, only for opponent Kaiya Ota to have one of his two victories taken from him for an infringement.

That set up a deciding race and Carlin takes full advantage. Once again the pair bump shoulders and have their elbows out, with Carlin, up out of his seat, sprinting home to the victory and potentially into the semi-finals, winning by 0.014 seconds.

However, the officials may be having a look at that one. Carlin will have an anxious wait to see if he is penalised. If he's not, he's in the semi-finals.

Image source, Getty Images

The Stade de France will be dripping in gold on Thursday, with five gold medals on offer for the chosen few.

The standout event is the men's 200m final, where Noah Lyles is aiming to become a double Olympic champion following his title success in the 100m last weekend.

The American will be up against the likes of team-mates Kenny Bednarek and Erriyon Knighton, plus Letsile Tebogo from Botswana, who beat Lyles in the semi-final and who also clocked the quickest time overall with 19.96 seconds.

• 19:00 - women's long jump final
• 19:25 - men's javelin final
• 19:30 - men's 200m final
• 20:25 - women's 400m hurdles final
• 20:45 - men's 110m hurdles final

Harry Poole
BBC Sport in Paris

What a start it was from Katarina Johnson-Thompson in the opening morning of heptathlon action at Paris 2024.

The two-time world champion tops the standings after two events, ahead of anticipated gold medal rivals Nafi Thiam and Anna Hall.

But can she remain as leader over night?

First up this evening is the shot put, which is one of the 31-year-old's weaker events.

Johnson-Thompson's personal best in that discipline is 13.92m, significantly down on Thiam's 15.54m, while Hall has also thrown 14.80m.

However, the fourth and final event of day one will be the 200m, in which the Briton has run faster than both.

With just 33 points separating the top three, this could be very, very close...

Britain's Hamish Turnbull won the first of three races against Jeffrey Hoogland, but the Dutch rider then took the next two to advance into the semi-finals.

Image source, Getty Images

While Katarina Johnson-Thompson and GB team-mate Jade O'Dowda are in shot put mode in the heptathlon, Laura Muir, Georgia Bell and Revee Walcott-Nolan will be the on-track entertainment in the women's 1500m semi-finals from 18:35 BST.

Scotland's Muir, who is ranked fourth in the world, sailed through her heat on Tuesday, finishing second in a time of three minutes 58.91 seconds.

The 31-year-old is hoping to upgrade her Tokyo 2020 silver to Paris gold medal and she told BBC Sport Scotland she is feeling "really, really relaxed" ahead of tonight's semi-final.

"I have never been in this position before as a reigning Olympic medallist," said Muir. "I have nothing to lose so if I can just enjoy it and stay relaxed, I know I can run fast."

Laura Kenny
Five time Olympic gold medal track and road cyclist on BBC TV

I felt like she [Emma Finucane] didn't learn from the round before because she did the exact same thing - it didn't work then.

To do it again in the final I feel like she didn't necessarily learn from that.

She is only 21 ultimately.

Jonathan Jurejko
BBC Sport in Paris

Image source, BBC Sport

Darting between Paris metro stations in Olympics rush hour can actually be quite fun.

Mainly because you’re trying to work out which Games venue everyone is piling out of/heading towards when you’re rushing past them in myriad underground walkways.

What sport is going on near here? What have I missed? Can I dash upstairs and find something to watch?

Earlier I spotted a group of French fans, all dressed in berets and wearing Tricolore face paint, on a train just east of central Paris.

I had the same thoughts as usual.

Turns out they were on the way to Bercy to watch France versus Germany in the men’s basketball semi-finals.

We are hearing Jack Carlin has been handed a reprieve in the men's sprint quarter-finals. Opponent Kaiya Ota thought he had advanced, but he has been penalised after the pair went shoulder-to-shoulder in the second race.

So, they go to a deciding third race to see who makes it through to the semi-finals.

Britain's Hamish Turnbull will also have a decider against Netherlands' Jeffrey Hoogland.

Victoria Pendleton
Olympic cycling gold medalist on BBC Radio 5 Live

You have a 50 percent chance of winning an individual sprint but here you one in six. So when you get to the final stages of a keirin, especially at a major championships anything can happen.

Dinesh: Class from Ellesse, The worthy Olympic champion. A good bronze for Emma Finucane.

Chris Boardman
Olympic cycling champion on BBC TV

Ellesse Andrews just sat on the front and controlled that one.

I thought that was how she was going to play it but I just hoped Emma Finucane would take that spot.

Image source, BBC Sport

Who's ready for some athletics?

Great Britain's Katarina Johnson-Thompson is leading the women's heptathlon after two events with a combined points total of 2197.

The reigning world champion will be limbering up for tonight's next two events along with her closet rival, the defending Olympic champion Nafissatou Thiam of Belgium, who sits in second place.

Can Johnson-Thompson finally secure that coveted heptathlon Games gold? We'll find out after the long jump, javelin and 800m have taken place on Friday.

• 18:35 BST - shot put (event three)
• 19:55 - 200m (event four)

It is medal number 51 for Great Britain in the 2024 Olympics. Britain's Emma Finucane gets it with a bronze in the women's keirin final.

Ellesse Andrews of New Zealand led through most of the race and took the gold, with Hetty van de Wouw of the Netherlands pipping Finucane to silver.

Britain's Katy Marchant came fourth and just missed out on a medal.