The middleweight category saw top seed Salvatore Cavallaro of Italy, left, knocked out by Pylyp Akilov of Hungary ©IBA

Picture gallery

Rio 2016 silver medallist Yoel Finol of Venezuela, left, survived a scare befoe defeating Nijat Huseynov of Azerbaijan ©IBA
Rio 2016 silver medallist Yoel Finol of Venezuela, left, survived a scare befoe defeating Nijat Huseynov of Azerbaijan ©IBA
Home favourite and Rio 2016 gold medallist Hasanboy Dusmatov of Uzbekistan, left, defeated Erislan Romero of Cuba ©IBA
Home favourite and Rio 2016 gold medallist Hasanboy Dusmatov of Uzbekistan, left, defeated Erislan Romero of Cuba ©IBA
Tomoya Tsuboi of Japan, left, defeated David Karanja of Kenya in the flyweight category ©IBA
Tomoya Tsuboi of Japan, left, defeated David Karanja of Kenya in the flyweight category ©IBA
Welterweight world champion Sewon Okazawa, left, up against Makan Traoré of France in the light middleweight category, lost his bout ©IBA
Welterweight world champion Sewon Okazawa, left, up against Makan Traoré of France in the light middleweight category, lost his bout ©IBA
Olympic champion Arlen Lopez of Cuba, left, defeated Pal Kovacs of Hungary in the light heavyweight category ©IBA
Olympic champion Arlen Lopez of Cuba, left, defeated Pal Kovacs of Hungary in the light heavyweight category ©IBA
Belarusian World Championships silver medallist Aliaksei Alfiorau, left, came out on top against Kirra Ruston of Australia in the light heavyweight category ©IBA
Belarusian World Championships silver medallist Aliaksei Alfiorau, left, came out on top against Kirra Ruston of Australia in the light heavyweight category ©IBA
Top seed Makhmud Sabyrkhan of Kazakhstan, right, defeated Sachin Siwach of India in the bantamweight category ©IBA
Top seed Makhmud Sabyrkhan of Kazakhstan, right, defeated Sachin Siwach of India in the bantamweight category ©IBA