CSKA Moscow trailed at home to MKB Euroleasing Sopron early in the fourth quarter but turned their game up a notch to win 81-77.
Wednesday's victory improved the Russian giants to 3-1 in Group B while dropping Sopron to 2-2.
|Ann Wauters had a double-double with 26 points and 11 rebounds|
Jelena Milovanovic drilled a jump shot at the start of the final period to put Sopron into a 62-57 advantage.
CSKA came back but still trailed 69-65 with 4:32 left after a three-pointer by Sopron's Edit Ratkainé.
Ilona Korstin made two free throws and Ann Wauters poured in two of her game-high 26 points to tie the game, only for Sopron to go back in front one last time thanks to another Ratkainé jump shot.
Big summer signing Janel McCarville replied with a lay-up to again pull CSKA level before Wauters twice split a pair of free throws and then hit a jumper with 45 seconds left for a 75-71 lead.
Ratkainé made one of two at the line to close the gap to three, but Sopron fouled Russia international Becky Hammon and she made both at the stripe to extend the lead back to five.
CSKA held on for a thrilling victory.
Wauters finished with a game-high 11 rebounds while Korstin had 15 points and six boards.
Kathleen MacLeod's 22 points led Sopron.