Cecilia Fransson/Gustav Koehn (Gavle, SWE) qualified for the 2018 Gothenburg Mixed Doubles Cup playoffs, dropping their quarterfinals match 9-8 against Aleksandra Bylina/Karol Nowakowski (Krakow, POL). of the 2018 Gothenburg Mixed Doubles Cup in Gothenburg, Sweden;
 
Fransson/Koehn finished 2-2 in the 16-team qualifying round. . In their opening game, Fransson/Koehn defeated Mintaute Jurkute/Paulius Rymeikis (Vilnius, LTU) 12-3, then won 7-6 against Natalie Wiksten/Kasper Wiksten (Hvidovre, DEN). Fransson/Koehn went on to lose 9-2 against Alina Biktimirova/Timur Gadzhikhanov (Moscow, RUS). Fransson/Koehn lost 8-4 to Dessi Osbjer/Jacob Hanna (Stockholm, SWE) in their final qualifying round match.
 
. For week 20 of the event schedule, Fransson/Koehn did not improve upon their best events, remaining at th place on the World Ranking Standings with total points. Fransson/Koehn ranks th overall on the Year-to-Date rankings with points earned so far this season.