6 August 2012 Last updated at 18:03

Olympics boxing: Great Britain's Savannah Marshall in shock upset

World champion Savannah Marshall is beaten by Marina Volnova of Kazakhstan in a shock upset in the women's Olympic boxing.

The pre-fight favourite Marshall trailed by two points going into the final round and was eventually defeated 16-12.

The Hartlepool-born fighter had been tipped by many to win a gold medal in the middleweight division.

Watch the full fight on the BBC Sport Interactive player.

Available to UK users only.