Tugstsogt Nyambayar of Mongolia (in red) defends against Robeisy Ramirez Carrazana of Cuba (in blue) during the Flyweight (52kg) boxing finals of the 2012 London Olympic Games at the ExCel Arena in London. AFP Photo/Jack Guez
Having lost in the semi-finals, Russia's Misha Aloian and Ireland's Michael Conlan both won bronze medals.
The 18-year-old Ramierz
got off to a flying start and attacked Nyambayar, 20, from the first bell taking the first round 6-5, but the Mongolian stood his ground in the second which finished 4-all.
Both fighters raised their game in the third with Nyambayar, who beat world champion Aloian in the semi-final, landing some solid shots to the face, but Ramirez came out on top to take the third round 7-5 and secure gold.
His delight was obvious when the result was announced and he danced his way around the ring.