Triin Madisson/Karl Kukner (Tallinn, EST) qualified for the 2018 WCT Tallinn Masters Mixed Doubles playoffs, dropping their quarterfinals match 5-3 against Marie Turmann/Harri Lill (Tallinn, EST). of the 2018 WCT Tallinn Masters Mixed Doubles in Tallinn, Estonia;
 
Madisson/Kukner finished 2-3 in the 18-team qualifying round. . In their opening game, Madisson/Kukner defeated Virginija Paulauskaite/Tadas Vyskupaitis (Vilnius, LTU) 9-7, then won 9-8 against Karen Wauters/Marco Etienne (Luxembourg, LUX). Madisson/Kukner went on to lose 11-1 against Turmann/Lill. Madisson/Kukner lost 8-6 to Zuzana Hajkova/Tomas Paul (Prague, CZE). Madisson/Kukner lost 5-3 to Turmann/Lill in their final qualifying round match.
 
. For week 28 of the event schedule, Madisson/Kukner did not improve upon their best events, remaining at th place on the World Ranking Standings with total points. Madisson/Kukner ranks th overall on the Year-to-Date rankings with points earned so far this season.