Kellie Harrington will square up to her old foe Mira Potkonen in a battle for lightweight gold at the Strandja multi-nations tournament in Sofia on Saturday after guaranteeing at least silver with victory over home favourite Denicia Eliseeva.
However Aoife O'Rourke had to settle for bronze after losing her semi-final to American Naomi Graham.
The Roscommon middleweight got past Brazilian Flavia Figuerdo on a split decision in Thursday's quarters but could not get past the North Carolina woman, who is an active member of the US Army.
Harrington came to Bulgaria after a seven-month lay-off with a thumb injury but hit the ground running and claimed her third win on the trot, with the 30-year-old is looking sharper by the day.
It means she'll come home with at least the runner-up medal but the Dubliner will be hungry to turn over Potkonen, the Finn who shattered Katie Taylor's Olympic dreams in Rio.
She also beat Harrington en route to gold in the last four of the 2018 European Elites and the two were due to meet in the European Games final last June before Harrington pulled out with that thumb problem, which she sustained in the semi-final.
This tournament is a warm-up event for March's the Olympic qualifier for European boxers in London.
Harrington will go there aiming to finish as one of the top six fighters in her division and thus book a ticket to Tokyo.
"I was a little bit anxious coming out here, but the preparation has been fantastic," Harrington said afterwards.
"I'm looking forward to tomorrow, getting in and putting in a big performance."