EWE Baskets Oldenburg had a much tougher game on their hands the second time around but still defeated U-Mobiltelco 77-72.
Tuesday's triumph gave the German team a 163-132 victory on aggregate in the EuroChallenge Round 1 and put them into next phase of the competition.
Oldenburg, playing in Europe for the first time, had won the first leg 86-60. They trailed 42-36 at half-time of the second leg but were never under serious threat of blowing their aggregate lead.
Nevertheless, Tab Baldwin's Cluj team were still in front at 69-68 with four minutes remaining before being outscored 9-1 over the last 3:30 of the contest.
Babmale Osby of Cluj had 18 points and six rebounds, and he said: "We played with more energy than in game one.
"The atmosphere in Oldenburg and our whole trip was a nice experience for me and my teammates.
"Our goal was to play better than in Cluj and to keep the score close. I think we succeeded in doing so."
Rickey Paulding Jr finished with 19 points and 13 rebounds for EWE Baskets.
Predrag Krunic (Head Coach Oldenburg):
"Same as in Cluj we have been the better team today. Cluj played much better than in the first game. I told my players before the game to take this serious. Despite that we lost our concentration in the second quarter totally. In the second half my players improved on the court and took the win."
Ruben Boumtje Boumtje (Oldenburg):
"Our opponent had a good performance tonight; that was exactly what we expected before. On the defensive end they were much better than in our first game. We felt a bit too comfortable after the big win in Cluj. Our opponent played well and we are very happy to reach the next round."
Tab Baldwin (Head Coach Cluj):
"We started with a different attitude than in Cluj. My team had more confidence. Oldenburg seemed to be too safe after the 26-point-win in Cluj. Today we really had the chance to win the game. In the second half we produced too many turnovers. In the end Rickey Paulding made the difference."
Babmale Osby (Cluj):
"We played with more energy than in game one. The atmosphere in Oldenburg and our whole trip was a nice experience for me and my teammates. Our goal was to play better than in Cluj and to keep the score close. I think we succeeded in doing so. The game was lost in the second half."