Tartu University Rock trailed by five points heading into the final quarter at CSK-VVS Samara but won 66-58 on Tuesday - the opening night of the EuroChallenge Regular Season.
Tanoka Beard poured in 19 points and pulled down eight rebounds for the visitors from Estonia, a team that reached the EuroCup Final Four last season.
CSK-VVS, a side that is again being coached by former Russia international Valeriy Tikhonenko, trailed 39-33 at half-time but turned up the defensive pressure after the interval and held Tartu to just six points to lead 50-45.
Coach Üllar Kerde's outfit turned on the style over the last 10 minutes, though, outscoring CSK-VVS 21-8 to claim an impressive win on the road.
Tartu also got a good game from Estonia internationals Janar Talts (11 points, eight rebounds) and Gert Kullamäe.
The latter scored all 12 of his points on four-of-six shooting from behind the arc.
Marquee Perry poured in a game-high 21 in defeat.
Tartu outrebounded CSK-VVS 39-30. Kerde's team overcame 22 turnovers to win.