10 August 2012 Last updated at 14:47

Paddy Barnes thought he had won Olympic semi-final

Watch Paddy Barnes against China's Zou Shiming in the light-flyweight semi-final at the Excel Arena.

The judges scored the contest 15-15 after three rounds but Zou was given the verdict on countback.

Trailing 11-8 after two rounds, Barnes produced a huge effort in the third and appeared to have done enough to win.