Aoife O'Rourke and Brendan Irvine have guaranteed themselves at least bronze medals after reaching their respective semi-finals at the 72nd Strandja Multi-Nations in Sofia, Bulgaria.

Castlerea contender O'Rourke defeated Sennur Demir of Turkey via a split decision in their women's middleweight quarter-final on Thursday to move within a step of the final, two days after overcoming home fighter Dobromiro Georgieve with a second round stoppage in the last-16.

Brendan Irvine is declared victorious over Bashkim Bajoku

She will face the winner of the quarter-final between USA's Naoimi Graham and Kacharl Bhayabati of India on Friday for a place in the final.

Irvine, who has already qualified for the Tokyo Olympics, followed up shortly after in the men's flyweight class, beating Bashkim Bejoku by unanimous decision to advance to the last-four.

Standing between the Belfast boxer and a place in the decider will be home favourite Dan Aenov or Georgia's Nodari Darbaidze.

Michaela Walsh, accompanied by coach Zauri Antia, reacts following her defeat to Karina Tazabekova

Fellow Team Ireland fighter Michaela Walsh lost out to Russia's Karina Tazabekova in their last-eight featherweight contest.

The Belfast native lost by split decision with two judges scoring the fight 30-27 and 29-28 respectively in Walsh's favour.

However, three judges awarded the bout to her Russian opponent with scores of 29-28.