Welsh duo Andrew Selby and Fred Evans each moved within one more win of a guaranteed medal after scoring unanimous victories in the quarter-finals of the World Championships in Almaty on Tuesday.
Flyweight top seed Selby won a terrific contest against Cuba's Gerardo Tejeira, making the most of his lightning-fast reflexes to emerge as a clear winner on the judges' cards.
Olympic silver medallist Evans - also top seed in the welterweight category, eased his way through to the last eight with a comfortable victory over Kenya's Rayton Okwiri.
Ireland will have five fighters in the quarter-finals after wins for flyweight Paddy Barnes and light-heavyweight Joe Ward on Tuesday.
Barnes, a double Olympic medallist at light-fly, scored a first-round stoppage win over Kenya's Simon Nzioki, who had advanced due to a cut sustained by England's Charlie Edwards in the previous round.
And European champion Ward won a unanimous decision over Hungary's Norbert Harcsa to join team-mates Tommy McCarthy, Jason Quigley and Michael Conlan in the last eight.
Belfast lightweight Sean McComb failed to join them after dropping a split decision to Azerbaijan's Elvin Isayev, while Scotland light-heavyweight Scott Forrest lost a unanimous verdict to Peter Mullenberg of Holland.