Russian side CSKA went on a 25-2 run in the fourth quarter to beat Limoges 86-76 and remain unbeaten in Group B.
CSKA (5-0) are top of Group B, while French side Limoges are struggling at 1-4.
Sonny Weems (18 points) and Milos Teodosic (16 points, 12 assists) starred in the come-from-behind victory.
Limoges scored just five points in the fourth quarter.
Barcelona are 5-0 and top of Group C after recording a 78-69 win over Panathinaikos.
In an even team effort, Ante Tomic (16 points), Maciej Lampe (12), Brad Oleson (12) and Juan Carlos Navarro (12) all contributed.
Real Madrid failed to keep their perfect record, edged 75-73 by Anadolu Efes.
Matt Janning provided the game-winning tip-in for the Turkish team, who top Group A with a 4-1 record - the same as Real.
Dinamo Banco di Sardegna Sassari claimed their first Euroleague win, beating Zalgiris Kaunas 92-80.
Shane Lawal (25 points) and David Logan (20) helped the Italians to the victory as they improved to a 1-4 win-loss record in Group A.
Alba Berlin overcame Cedevita 80-67 in Group B.