Sturm Graz's Dimitri Lavalėe was sent off in the 89th minute.
1-1 came through an own-goal in the 45th minute.
In a challenging Thursday fixture at Stade du Roudourou, Sturm Graz faced a setback, enduring a 2-1 defeat to Brest. One goal proved decisive in the Champions League encounter, leaving Sturm Graz on the losing end.
Brest started the match best and took the lead when Hugo Magnetti netted after 23 minutes, making it 1-0.
With 56 minutes on the clock, Brest's Abdallah Sima found the net following a Ludovic Ajorque assist to seal the win.
Brest's next Champions League games are against Salzburg (away) on 1 October, Brest (home) on 23 October and Sparta Praha (away) on 6 November. Sturm Graz play Club Brugge (home) on 2 October, Sporting CP (home) on 22 October and Borussia Dortmund (away) on 5 November.
Looking at the table, we find Brest in 13th place, while Sturm Graz are in 28th place.