Dexis W Namur's Catherine Kraayeveld put in an inspirational performance but was unable to prevent her side slipping to a 66-56 home defeat to Kosit 2013.
The 26-year-old power forward netted 20 points but the Belgian outfit remain bottom of Group C after the home loss.
Forward Ivana Jalcova claimed 16 points for the impressive Kosit side and was supported by 10 points apiece from Janel McCarville and Luisa Michulkova.
The visitors controlled the first quarter and led 16-9 thanks to Jalcova, who gave her side the early advantage.
Namur fought back in the second quarter and narrowed the gap to just two points by the half-time interval as Kraayeveld hauled her side back into the contest.
The third period was an even affair with Kraayeveld helping her side stay in touch until late in the quarter when Michulkova increased the gap to eight points at 48-40.
Kraayeveld ran out of steam in the final quarter and McCarville ran riot to help Kosit claim the win.