Oostende hung on in the final seconds to see off Entente Orleanaise 69-68 in their EuroChallenge Group H clash.
Oostende were up 66-55 midway through the final quarter before the visitors launched a late rally.
Zacherie Moss' lay-up started a 9-0 run, capped by another Moss basket, that made it 66-64 with 2:14 to go.
Darrel Mitchell and William Thomas both missed three-pointers for Oostende, but Ben Ebong snapped their scoring drought with a pair of free throws.
Moss countered with another lay-up and, after Matthew Lojeski's turnover, Alsheem Smith dunked to tie the scores at 68-68 with 20 seconds left.
Smith then fouled Thomas who made one of two free throws to edge Oostende in front, and then hung on as Smith missed a jump-shot on the buzzer.
Thomas scored 19 points to lead Oostende, while Mitchell had 14 and Lojeski 10.
Amara Sy and Moss had 12 each for Orleanaise, while Smith finished with 10.
Orléans Loiret Basket Head Coach Philippe Hervé:
"This was a great game, good intensity. We played three good quarters but a basketball game is four quarters. We had the chance to win this game but lost it in first quarter. Oostende had 10 min of great and aggressive defence.
Telenet Oostende Head Coach Jean Marc Jaumin:
"Orléans kept us under a lot of pressure, they had a good 3 point shot and a great penetration. We did a good analysis of Orléans, they can shoot 3 points and always take a lot of rebounds but we could hold them on 24 rebounds."