South Africa's Simpiwe Vetyeka falls after being punched by Nonito Donaire (R) from the Philippines during their the WBA world featherweight tittle fight at the Venetian Macao hotel in Macau May 31, 2014. REUTERS/Tyrone Siu (CHINA - Tags: SPORT BOXING) 

Nonito Donaire from the Philippines (R) punches South Africa's Simpiwe Vetyeka during their WBA world featherweight title fight at the Venetian Macao hotel in Macau May 31, 2014. REUTERS/Tyrone Siu(CHINA - Tags: SPORT BOXING) 

Nonito Donaire from the Philippines (C) celebrates after winning the WBA world featherweight title against South Africa's Simpiwe Vetyeka (not seen) at the Venetian Macao hotel in Macau May 31, 2014. REUTERS/Tyrone Siu(CHINA - Tags: SPORT BOXING) 

Nonito Donaire from the Philippines (C) celebrates with Manila's Mayor Joseph Estrada (L) after winning the WBA World featherweight title fight against South Africa's Simpiwe Vetyeka (not seen) at the Venetian Macao hotel in Macau May 31, 2014. REUTERS/Tyrone Siu (CHINA - Tags: SPORT BOXING) 

Japan's Hozumi Hasegawa (L) is punched by South Africa's Simpiwe Vetyeka during their World Boxing Council (WBC) bantamweight title bout in Tokyo May 3, 2007. REUTERS/Toru Hanai (JAPAN) 

Japan's Hozumi Hasegawa (L) is punched by South Africa's Simpiwe Vetyeka during their World Boxing Council (WBC) bantamweight title bout in Tokyo May 3, 2007. REUTERS/Toru Hanai (JAPAN) 

Japan's Hozumi Hasegawa (R) provokes South Africa's Simpiwe Vetyeka during their World Boxing Council (WBC) bantamweight title bout in Tokyo May 3, 2007. REUTERS/Toru Hanai (JAPAN) 

Japan's Hozumi Hasegawa (top) celebrates after defeating South Africa's Simpiwe Vetyeka in their World Boxing Council (WBC) bantamweight title bout in Tokyo May 3, 2007. REUTERS/Toru Hanai (JAPAN) 

Japan's Hozumi Hasegawa (L) punches South Africa's Simpiwe Vetyeka during their World Boxing Council (WBC) bantamweight title bout in Tokyo May 3, 2007. REUTERS/Toru Hanai (JAPAN) 

Japan's Hozumi Hasegawa (L) punches South Africa's Simpiwe Vetyeka during their World Boxing Council (WBC) bantamweight title bout in Tokyo May 3, 2007. REUTERS/Toru Hanai (JAPAN) 

Japan's Hozumi Hasegawa (R) punches South Africa's Simpiwe Vetyeka during their World Boxing Council (WBC) bantamweight title bout in Tokyo May 3, 2007. REUTERS/Toru Hanai (JAPAN)