The 2018 NBA Gatorade League winner with Austin Spurs got the mark by playing eight minutes off the bench and added two rebounds.
Had he converted more chances from the free throw line, the University of Connecticut product would have finished in double digits.
Brimah scored just one of four attempts from the charity stripe while converting three of four field goal attempts in the game.
Amida battled foul trouble despite his limited time on the court; four fouls were called on the 2014 National Collegiate Champion.
The win puts Partizan in a good stead to progress beyond the quarterfinals as Game Two tips off on Thursday May 23.
The game was one of two played on Tuesday as Borac beat Dynamic BG 83-75 in the second game of the night. Beograd and Zvedza will be in action tonight after clinching wins over Vrsac and Zlatibor.
By Yaw Adjei-Mintah
@YawMintYM on Twitter