Hailey Duff/Robin Brydone (Stirling, SCO) qualified for the 2018 International Mixed Doubles Dumfries playoffs, dropping their quarterfinals match 9-2 against Michele Jaeggi/Sven Michel (Bern, SUI). of the 2018 International Mixed Doubles Dumfries in Dumfries, Scotland;
 
Duff/Brydone finished 4-1 in the 24-team qualifying round. . In their opening game, Duff/Brydone defeated Marie Turmann/Harri Lill (Tallinn, EST) 9-6, then won 13-1 against Scotland's Lesley Gregory/Martin Gregory. Duff/Brydone went on to lose 10-4 against Jayne Stirling/Fraser Kingan (Aberdeen, SCO). Duff/Brydone responded with a 11-9 win over Zuzana Hajkova/Tomas Paul (Prague, CZE). Duff/Brydone won 6-5 against Scotland's Lucy Blair/Mark Taylor in their final qualifying round match.
 
. For week 33 of the event schedule, Duff/Brydone did not improve upon their best events, remaining at th place on the World Ranking Standings with total points. Duff/Brydone ranks th overall on the Year-to-Date rankings with points earned so far this season.