Great Britain's Andrew Pozzi and Lawrence Clarke have both failed to progress through their semi-final races in the men's 110m hurdles.
Pozzi was tipped to have an outside chance of a medal in Rio de Janeiro while Clarke finished fourth in London in 2012, but neither Team GB representative came close to reaching the final.
In the first semi-final, Pozzi clattered numerous hurdles before eventually finishing in sixth place but he was later disqualified.
Ten minutes later, Clarke went in the second semi but in a fast-paced race where the majority of the field all recorded quicker times than third place in the first heat, the British runner could only finish in sixth.
