, 20, failed to qualify for the women's 800m final. The pair finished seventh in their respective races.
Elsewhere, the British quartet of Eilidh Child, Shana Cox, Margaret Adeoye and individual 400m champion Christine Ohuruogu qualified fourth fastest for Saturday's 4x400m final after winning their heat in 3:25.39.
However, without the injured Perri Shakes-Drayton, who returned to the UK on Friday for treatment on her knee, the GB team will face a difficult task to get past the US, Russia and Jamaica in the final to win a medal.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.