Great Britain's Perri Shakes-Drayton has qualified for the final of the women's 400m hurdles.
The 23-year-old finished third in her semi-final earlier this evening in a time of 55.19s. As a result, she was forced to wait to see if she qualified for Wednesday's medal battle as a fastest loser.
Russia's Elena Churakova had initially claimed her spot in the final, only to be disqualified moments later for a lane infringement.
The final takes place on Wednesday night.
