Scotland's Lynsey Sharp was unable to make the Olympic final of the women's 800 metres.
Sharp, the daughter of former Olympic sprinter Cameron Sharp, won the Olympic trials and claimed silver in the European Championships in Helsinki.
But after qualifying well from the heats the 22-year-old was only able to finish seventh in Thursday night's first semi-final in two minutes 01.78 seconds, more than a second outside her personal and season's best.