Nineteen-year-old Dina Asher-Smith led the way into the women s 200m final, running the fastest time in the semi-final round on Thursday night.

The women s 800m semi-finals on Thursday night provided personal bests galore, and gave an indication of the strong medal contenders for Saturday s final.

It took just two attempts for Anita Wlodarczyk to produce a mark that was almost three metres farther than any other woman in the world had managed this year.

Following Wednesday's drama-filled first round heats, the semi-finals on Thursday night served up the two fastest World Championship semi-finals in the history of the event to perfectly set up what is likely to prove a fantastic final on Friday.

The IAAF World Championships, Beijing 2015 has reached its half-way point, but there are still many more titles yet to be decided.

World indoor 1500m champion Ayanleh Souleiman was the only big fish who will play no further part in the competition in an otherwise routine first-round qualification for the men s 1500m.