UMMC Ekaterinburg came back from an 11-point deficit at half-time to record a 96-76 victory at Halcon Avenida.
Poland's Agnieszka Bibrzycka was five of seven from three-point range and led Ekaterinburg with 22 points as the Russian outfit clinched its ninth victory in 10 Group B games.
Avenida were already assured of a top-four finish in the group and they ended their group campaign with a 4-6 record.
Ekaterinburg, who easily have one of the most talented rosters in Europe, trailed 46-35 at half-time and looked to be in trouble.
They outscored their hosts 32-11 in the third quarter, though, and then pressed home that advantage in the final period for a decisive victory.
Penny Taylor, one of Ekaterinburg's three Australia internationals, finished with 18 points and six rebounds.
Alessandra Santos, the Avenida center, led her team with 15 points and nine rebounds.