Barça began the match with a 0-7 in the first two minutes, before CSKA came storming back to level the scores. After a few minutes without a basket, Svetislav Pesic's side converted two consecutive three-pointers from Claver and Hanga (7-13, min 6), before heading into the second period three points up (15-18).
CSKA came out fighting, and turned the tables within five minutes of the second period (29-26). The hosts edged further ahead before a three-pointer from Mirotic brought Barça back into it by halftime (40-37).
The second half remained very even and there was still only three points in it going into the last 10 minutes, although this time the advantage was Barça's (60-63). The game pivoted back and forth until a three pointer from CSKA's Mike James levelled the scores with five seconds to play (80-80). It was then that Mirotic struck with a winning basket on the buzzer.
It's a victory which qualifies Barça for the playoffs, and was their first victory at CSKA's track since 2012.
CSKA: James (12), Voigtmann (-), Kurbanov (11), Hines (10) and Baker (2) –starters–, Bolomby (6), Strelnieks (2), Hackett (17), Sant-Ross (-), Koufos (6) and Hilliard (14).
Barça: Higgins (17), Claver (3), Hanga (5), Mirotic (23) and Tomic (2) -starters-, Davies (16), Ribas (-), Oriola (3), Abrines (-), Delaney (6) and Kuric (7).
Periods: 15-18 / 40-37 / 60-63 / 80-82
Officials: Lottermoser, Christodoulou and Nikolic.