Spartak St Petersburg blew open a close game midway through the fourth quarter and rolled to an 88-70 victory over Szolnoki Olaj.
The visitors from Hungary had trailed by 12 in the last period but reeled off five straight points to make it interesting.
When a three-ball from Marton Fodor fell through the hoop, Szolnoki had closed the gap to 70-64 with 5:18 left.
Spartak hit Szolnoki Olaj with an 8-0 run.
Evgeny Kolesnikov sank two free-throws, Miha Zupan buried a jumper and Smush Parker capped the spurt with two more from the charity stripe and a dunk.
Spartak ended up winning by 18 when Dijon Thompson, who had a game-high 21 points, buried a three-pointer right before the end.
Thompson also led his team with nine rebounds while Zupan, who played for Slovenia at the FIBA World Championship, ended up with 17 points.
Obie Trotter and Marton Bader had 18 points apiece in defeat.
Bader also had nine boards.
Zvi Sherf, Head Coach of Spartak:
"We started today in the EuroChallenge. There will be no easy games in this tournament. We achieved a big lead in the end and I am happy about this. We came to this game under affect and under pressure after a terrible lost against Triumph in the PBL. Finally we did what we wanted to do. It will be a tough game in Hungary, on the home court of our rival. They made good 3-pints shots, very good combinations. Tomorrow we start to prepare for the game with Gravelines. It's a very good opponent."
Peter Por, Head Coach of Szolnoki Olaj:
"We played a very good game against a very good team. I am glad that we could fight during most of the game. We really enjoyed to play against such a club with big tradition as Spartak. Until the 25th minute of the game we managed to opponent to our rival but then we were tired. We would have needed a deeper rotaion in that moment".
Evgeny Kolesnikov, Player of BC Spartak:
"In the first half we were under pressure after the loss to Triumph. But in the second half we could find our game, relaxed and everything went well. We paid more attention to defence and everything became good in offence."