KK Zagreb did the double over Khimik Yuzhny with a 70-62 triumph in Ukraine on Wednesday.
The result has left both sides with 2-3 records in Group F. Dexia Mons-Hainaut and Galatasaray Café Crown are above them at 3-2.
Four Zagreb players hit double digits in scoring, led by Krunoslav Simon's 15.
The Croatian outfit jumped out to a 17-13 lead by the end of the first quarter and extended that to 38-28 by half-time.
Khimik managed to claw their way back to just eight points down with 5:46 to go in the third, but Zagreb went on a 10-3 run to close the frame and entered the final 10 minutes on top 55-40.
Khimik began the fourth quarter with renewed vigor and when Jarrius Jackson drilled a three-ball with 5:38 remaining in the game, the home side trailed only 56-54.
Dzenan Rahimic made a jump shot and Simon followed with a lay-up as Zagreb went back in front by six and stayed in control.
Zagreb did a lot of their damage at the free throw line, making 20 of their 23 attempts.
Wykeen Kelly had a game-high 17 points in defeat for Khimik.