Michael Conlon, Michael O'Reilly and Brendan Irvine are each a fight away from a medal at the World Championships in Doha.
Conlon survived a tough first round to beat his Brazilian opponent to move through to the bantamweight quarter finals.
Belfast figher Irvine won a split decision over his Turkish light flyweight opponent.
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O'Reilly also won his last-16 contest this evening.
