Silver medallist Purevdorj Serdamba of Mongolia, gold medallist Zou Shiming of China and bronze medallists Paddy Barnes of Ireland and Yampier Hernandez of Cuba (L-R) pose during the medal ceremony after the light flyweight (48kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Lee Jae-Won (CHINA)

Bronze medallists Paddy Barnes (L) of Ireland and Yampier Hernandez of Cuba pose during the medal ceremony after the light flyweight (48kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Lee Jae-Won (CHINA)

Serdamba Purevdorj (R) of Mongolia fights Yampier Hernandez of Cuba during their men's light flyweight (48kg) semi-final boxing match at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Lee Jae-Won (CHINA)

Serdamba Purevdorj (R) of Mongolia fights Yampier Hernandez of Cuba during their men's light flyweight (48kg) semi-final boxing match at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Marcos Brindicci (CHINA)

The referee declares Serdamba Purevdorj (L) of Mongolia the winner in his men's light flyweight (48kg) semi-final boxing match against Yampier Hernandez of Cuba at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Lee Jae-Won (CHINA)

Serdamba Purevdorj (L) of Mongolia fights Yampier Hernandez of Cuba during their men's light flyweight (48kg) semi-final boxing match at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Lee Jae-Won (CHINA)

Serdamba Purevdorj (R) of Mongolia fights Yampier Hernandez of Cuba during their men's light flyweight (48kg) semi-final boxing match at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Lee Jae-Won (CHINA)

Yampier Hernandez (L) of Cuba fights Paulo Carvalho of Brazil during the men's light flyweight (48kg) quarterfinal 4 boxing match at the Beijing 2008 Olympic Games August 19, 2008. REUTERS/Nir Elias (CHINA)

Yampier Hernandez (L) of Cuba fights Paulo Carvalho of Brazil during the men's light flyweight (48kg) quarterfinal 4 boxing match at the Beijing 2008 Olympic Games August 19, 2008. REUTERS/Lee Jae-Won (CHINA)

Yampier Hernandez (R) of Cuba fights Paulo Carvalho of Brazil during the men's light flyweight (48kg) quarterfinal 4 boxing match at the Beijing 2008 Olympic Games August 19, 2008. REUTERS/Lee Jae-Won (CHINA) 

Georgiy Chygayev (L) of Ukraine fights Yampier Hernandez of Cuba during their men's light flyweight (48kg) round of 16 boxing match at the Beijing 2008 Olympic Games August 16, 2008. REUTERS/Lee Jae-Won (CHINA) 

Georgiy Chygayev (L) of Ukraine fights Yampier Hernandez of Cuba during their men's light flyweight (48kg) round of 16 boxing match at the Beijing 2008 Olympic Games August 16, 2008. REUTERS/Lee Jae-Won (CHINA)

Yampier Hernandez (L) of Cuba fights Sherali Dostiev of Tajikistan during their men's light flyweight (48kg) round of 32 boxing match at the Beijing 2008 Olympic Games August 13, 2008. REUTERS/Lee Jae-Won (CHINA)

Yampier Hernandez (R) of Cuba fights Sherali Dostiev of Tajikistan during their men's light flyweight (48kg) round of 32 boxing match at the Beijing 2008 Olympic Games August 13, 2008. REUTERS/Lee Jae-Won (CHINA) 

Cuba's Yampier Hernandez warms up before his Olympic boxing qualifier match against Colombia's Oscar Negrete in Guatemala City in this April 30, 2008 file photo. Defections have cut through their highly rated boxing squad but if Cuban officials are worried about the strength of the national team heading for the Beijing Olympics, they are certainly not saying so. These losses have left Cuba with a boxing team that is young, has no Olympic experience and is going up against one of the strongest fields in Olympic history, boxing coach Pedro Roque said before a recent tournament against French boxers. To match feature OLYMPICS/CUBA REUTERS/Daniel LeClair/Files (GUATEMALA) (BEIJING OLYMPICS 2008 PREVIEW) 

Cuba's Yampier Hernandez tapes his hands before his Olympic boxing qualifier match against Colombia's Oscar Negrete in Guatemala City April 30, 2008. REUTERS/Daniel LeClair (GUATEMALA) 

Cuba's Yampier Hernandez (R) and Colombia's Oscar Negrete compete during an Olympic boxing qualifier match in Guatemala City April 30, 2008. REUTERS/Daniel LeClair (GUATEMALA) 

Cuba's Yampier Hernandez warms up before his Olympic boxing qualifier match against Colombia's Oscar Negrete in Guatemala City April 30, 2008. REUTERS/Daniel LeClair (GUATEMALA) 

Cuba's Yampier Hernandez warms up before his Olympic boxing qualifier match against Colombia's Oscar Negrete in Guatemala City April 30, 2008. REUTERS/Daniel LeClair (GUATEMALA)