Raphoe's Chloe and Sam Magee are through to the quarter-finals of the European Badminton Championships in Kiev following a 21-16 21-15 win over Scotland's top pair Chris Grimley and Eleanor O'Donnell.
Seeded seventh and ranked 30th in the world, the Magee siblings will play the top seeds and World No.8 pair Marcus Ellis and Lauren Smith of England for a place in the semi-finals.
Sam said: "It will be a tough match. We are involved in a battle to qualify for the Tokyo Olympics where only 16 pairs will be in the draw.
"We know we have to reach quarter-finals and more in the remaining qualifying tournaments that take place before mid-June to keep our challenge on course."
The Magees reached the last-16 with victory over Ties van der Lecq and Debora Jille of the Netherlands in three games on Wednesday.
Sam added: "Tokyo would be my first Olympics but Chloe, as a singles player, has already been to the Beijing, London and Rio Games."
Meanwhile, young Dubliner Nhat Nguyen is well placed to qualify for the men's singles in Tokyo with 64 places in the draw.
Now ranked 53rd in the world, he reached the last-16 in Kiev but missed out on a quarter-final place, losing to fourth seed and World No.20 Hans-Kristian Vittinghus of Denmark 11-21 11-21.
Elsewhere in the men's singles, top seed Viktor Axelsen progressed to the quarter-finals with a win over Max Weisskirchen, while second seed Anders Antonsen needed three games to see off Emre Lale.