Image source, Getty Images

European leader Yaroslava Mahuchikh of Ukraine has sailed into the final, jumping the qualification height of 1.92m.

GB's Morgan Lake comes up short in her first attempt at that mark.

Here's how the heptathlon standings looked earlier, before news broke that Katarina Johnson-Thompson has withdrawn with a leg injury.

Belgian Nafi Thiam leads. Great Britain's Jade O'Dowda is fifth, with Johnson-Thompson back in ninth and struggling following the shot put.

The 200m - the fourth of the seven events - takes place from 20:45.

The British 4x400m mixed relay quartet has been confirmed for tonight's final.

Teenager Charlie Carvell, winner of European Under-20 silver last year, will lead off the team, which also includes Lewis Davey, winner of mixed 4x400m relay silver and men's 4x400m bronze at last summer's World Championships.

L1: Charlie Carvell

L2: Hannah Kelly

L3: Lewis Davey

L4: Emily Newnham

On the track, better news for GB as CJ Ujah cruises through the heats.

His time of 10.23 seconds won his heat and was the fourth quickest time overall.

Image source, Getty Images

It is very much worth remembering that the Olympics start in 49 days, with the athletics getting underway on 1 August. Any injury now could be fatal to an athlete's chances.

KJT has clearly decided it isn't worth taking the risk.

Image source, Getty Images

British Athletics confirm that Katarina Johnson-Thompson is withdrawing from the remainder of the heptathlon due to an issue with her right leg.

Coach Aston Moore said: “Kat has developed a small niggle in her right leg, and in light of the proximity of the Olympic Games we have chosen to bank what we have learned from this first day of competition and withdraw from the heptathlon.

“We don’t want to risk losing any time from training which could be the result if she was to carry competing with it for another day. We wish all the other competitors well for the rest of the competition.”

Major breaking news from the heptathlon, where world champion Katarina Johnson-Thompson has withdrawn after three of the seven events.

She was ninth in the standings after the shot put earlier.

Some good news for Britain.

But we have some bad news too...

Time for the final heat in the men's 100m.

CJ Ujah of Britain is in lane two.

10.31 seconds would guarantee a place in the semi-finals.

European leader Yaroslava Mahuchikh of Ukraine, who jumped 2.04m in January this year, has just entered the fray.

She easily clears 1.89m.

GB's Morgan Lake has cleared 1.89m in her high jump heat.

The automatic qualification mark, 1.92m, is the next mark up for her. Reach that, and Lake will go straight into the final.

Image source, Reuters

Phil Minshull
Athletics commentator on BBC iPlayer

There wasn't an obvious infraction then, but on the replay with a close-up on Meba Zeze it is obvious.

Oliwer Wdowik of Poland wins the second heat in 10.26 seconds, fourth fastest overall.

Republic of Ireland record holder Israel Olatunde runs a season best 10.31, that's third in the heat, sixth overall and enough to secure a semi-final spot.

Yes, Meba Zeze has been disqualified.

The Frenchman does not contest his red card. Replays show it was clear cut, he went too soon.

Ooh, a few athletes have gone before the gun in the second heat.

Will anyone be disqualified for a false start?

The second heat is about to get under way in the men's 100m.

Britain's CJ Ujah will race in the third heat.

Tim Hutchings
Former middle and long-distance runner on BBC iPlayer

Lawrence Okoye is vulnerable at the moment.

Image source, Reuters

GB's Lawrence Okoye can't improve on his opening throw of 62.56m.

Okoye is currently eighth of the 12 finalists. He needs to be in the top six after round three, otherwise he won't make the cut and will be out of this final.

The favourite, Mykolas Alekna, is winding up for his second throw...

The Lithuanian takes the lead, with 66.98 metres.

Given Alekna is the current world record holder, with 74.35m, we should expect to see a lot more.

First round done in the men's discus final. Another five to go.

Slovenia's Kristjan Ceh is the early leader.