Dina Asher-Smith had mixed emotions despite defying the odds to finish a remarkable fourth in a thrilling 200m final at the IAAF World Championships in London on Friday night.

Six months ago, the prospect of walking out in to the London Stadium might well have seemed inconceivable for the Orpington ace – let alone finishing fourth at the World Championships, her best ever finish in a world final.

In February, the 21-year-old broke a bone in her foot, spending several weeks on crutches and a number of months unable to train properly – only putting her spikes on for the first time six weeks before Friday night's showpiece at the London Stadium.

But the British record holder, who set a season’s best of 22.73 in the heats then equalled that mark in the semi-finals on Thursday night, got off to a terrific start and just missed out on a medal, dashing home in yet another season’s best, this time clocking 22.22 - just seven-hundredths of a second behind bronze.

The Blackheath & Bromley AC star admitted: "I was coming down the home straight thinking 'I didn't know I was in this kind of shape'. But to see I missed out on a bronze medal by seven hundredths - which okay, in sprinting, it's a lot - but when you've broken your foot it's really not that much.

"I'm quite frustrated but in reflection I'm really happy to have done a 22.2 off hardly any training.

“I didn’t know I could do 22.22 so to do that which is faster than I did last year in an Olympic year, I am over the moon with that.

"I didn't even have placings in my mind - I was just so happy to be here. As I came down the home straight the crowd were getting louder and louder and I was thinking 'This is going quite well, keep going.'

"Fourth is my best finish ever in a world final, but so close... I was so close. I had absolutely no idea that I could do that tonight. I was just having fun, enjoying it and running as fast as I could.

“It hurts to just miss out but at the same time I am so happy to be that close. That was so close to my PB that I am really happy. To finish fourth in world final after having a broken foot is really good and my best ever finish.”

Dutchwoman Dafne Schippers defended her title in 22.05secs, with the Ivory Coast’s Marie-Josee Ta Lou clocking 22.08 to take silver to add to her 100m gold and Bahamian Shaunae Miller-Uibo clinching bronze in 22.15.

Asher-Smith and her Blackheath & Bromley AC teammate Adam Gemili are set to run in the heats of the 4x100m relay on Saturday morning with the finals later tonight.