Great Britain's Tiffany Porter and Cindy Ofili have both earned places in the women's 100m hurdles final.
Porter - a bronze medallist at the 2013 World Championships - appeared to be on the way out of the competition after finishing in fourth position in the first semi-final.
However, neither of the third-place finishers in semi-final two or three registered a faster time, leaving the 28-year-old to gratefully take her spot in the final.
Ofili - Porter's younger sister - made lighter work of her semi-final as she eased through in second place to secure an automatic spot.
The final will take place later on Wednesday evening.
