Cajasol Seville beat Lokomotiv Rostov 74-61 in Spain on Tuesday night to leave both sides level with Ural Great Perm in the chase for second place in Top 16 Group K.
All three clubs are now 2-3 behind Proteas EKA AEL (4-1).
The top two sides will advance to the Quarter-Finals.
Rostov will travel to Cyprus to face Proteas next week while Cajasol will take on Ural Great in Spain.
Cajasol were in a dogfight at half-time, leading 30-28 with Polish international Michael Ignerski having scored seven of his game-high 19 points.
They never relinquished the lead.
Tyrone Ellis connected from three-point range and Juan Jose Triguero dunked to start the second half for Cajasol and they went in front by 10 before finishing the frame on top 50-42.
Cajasol stayed comfortably ahead in the fourth, opening a 13-point advantage.
Rawle Marshall scored 16 for Rostov, who were out-rebounded 37-26
Pedro Martínez, Cajasol coach:
"The game has been hard. It has been a very physical game. We had trouble to move the ball in attack because they played with aggressiveness. We played very well on defence. Michel Diouf played a good game, he has helped the team to win".
Andrei Novikov, Lokomotiv Rostov coach:
"First of all, I want to congratulate Cajasol for the win. Why did we lose the game? We lost because they rebounded better than we did. We also committed too many turnovers."