Where would this live text coverage be without a vote? It's best not to think about it. 

Today we're asking a simple one: who will win the men's 200m. You've eight athletes to choose from, though we're guessing it will be one of two men who will come out on top. 

Get voting, have fun, and we'll reveal the results later this afternoon.

Image source, BBC Sport

There's an update on Wayde van Niekerk to tell you about. The South African became the fourth fastest 400m runner of all time when he won Wednesday's final, but collapsed after the race and was taken off the track on a stretcher.

But the 23-year-old has told BBC Radio 5 live that he is OK and "just needed to catch my breath".

"It was normal lactic acid after the race," said  Van Niekerk. "I made a mistake of going to sit down but I couldn't get up again. Other than that I was 100% all the way to the hospital and back again."

Image source, Getty Images

Image source, Getty Images

British record holder Isobel Pooley also failed to make the high jump final. She cleared 1.89m, but it was not enough.

There was disappointment for 18-year-old  Morgan Lake - the youngest on the British team - as she failed to make it into the women's high jump final in her first World Championships. 

What else happened while we were dreaming about cheese and teeth? Britons Tiffany Porter and Cindy Ofili have progressed to the semi-finals of the women's 100m hurdles.

Porter was the second fastest qualifier as she won her heat in 12.73 seconds, while Ofili came fourth in her heat in 12.97.

Stephanie Twell's time of 15 minutes 34.72 seconds saw her qualify as one of the fastest losers to reach Sunday's women's 5,000m final.

And British pair Charlie Grice and Chris O'Hare qualified for the men's 1500m semi-finals.

Image source, Getty Images

"I wanted to come out and put everything that was wrong right again," said Johnson-Thompson, who finished 28th in the heptathlon after three fouls in the long jump. 

"I'm very grateful to be able to represent the country in the long jump as well as the heptathlon, so I have a chance to rectify my mistake.

"I've had to sit and live with my thoughts for the last few days so it has been hard."

Image source, Getty Images

Before we lose ourselves in Bolt versus Gatlin the sequel, it's probably best to update you with what's been happening in the Bird's Nest. 

Katarina Johnson-Thompson, another athlete seeking to avenge earlier disappointment in Beijing, was one of three British athletes to qualify for the women's long jump final. 

The 22-year-old, who missed out on a heptathlon medal after messing up in the long jump, jumped 6.79m. Team-mates Lorraine Ugen (6.87m) and Shara Proctor (6.68m) also qualified.

Image source, Getty Images

Live track and field online and on BBC Two from now until 14:45 BST, birthday celebrations, Bolt v Gatlin, Christine Ohuruogu... what a day. 

Hopefully Denise Lewis has enough cake for us all...

Hello! There's no need to hide behind your cushions just yet because there are a few hours to go before the fifth day of the World Championships reaches an angsty climax. 

Plenty of nails will be bitten though before we learn the answers to the day's questions. 

Can Usain Bolt clobber Justin Gatlin once again? Will Christine Ohuruogu produce another perfectly-timed run to defend her 400m title? How fast can teenage wonder Dina Asher-Smith go? 

Image source, Getty Images

[Der-dum der-dum] Just when you thought it was safe to go back on the track the legend continues... 

Four days after Beijing witnessed an incredible 100m final, when track and field was 'saved' from what some predicted would have been a horror of a result, the conquered bad boy is back, hunting for revenge. 

Bolt versus Gatlin 2...The fastest men on the planet are back. Watch it. Revel in it. Don't have nightmares. [Cue dramatic orchestral music]. 

Image source, Science Photo Library