South Korea's Moon Dae-sung won gold in the men's taekwondo over 80kg category on the final day of competition.
Moon knocked out his Greek opponent, Alexandros Nikolaidis, just a minute into the bout after catching him in the temple with a reverse roundhouse kick.
Nikolaidis slumped to the mat and although he was helped to his feet by his coach, did not regain full consciousness for several minutes.
Eventually Nikolaidis came round to rapturous applause from the crowd.
Frenchman Pascal Gentil beat Ibrahim Kamal of Jordan 6-2 to take the bronze.
China's reigning champion Chen Zhong took gold in the women's over 67kg (heavyweight) class with a 12-5 win over France's Myriam Baverel.
Chen used her greater height and reach to good effect to run
out a comfortable winner by the end of the third round.
Venezuelan Adriana Carmona won bronze, beating Brazil's Natalia Silva 7-4 on points.