Crvena Zvezda dominated Galatasaray from the opening tip and cruised to a 30-point victory (87-57) to remain on top (4-1).
Joe Ragland led the winners in scoring with 21 points, while Billy Baron added 16 and Maik Zirbes 15 points, respectively.
Tai Webster posted 16 points for the losing squad, with Zach Auguste contributing 14 and nine rebounds.
The Serbians made a great start to the game and never looked back (26-13). They extended their lead to 18 at halftime (44-26) and triumphed over their opponents, who were unable to turn things around.
The Turks suffered their third defeat in five games (2-3).
— EuroCup (@EuroCup) October 30, 2018
In the other matches, Valencia decimated Trento at home (87-66), ASVEL Villeurbanne rallied past Zenit St Petersburg (89-68) and Rathiopharm Ulm survived Brescia (83-82).