Brahim was handed the surprise chance by coach Zinedine Zidane for the 3-2 win.
He stated: "I'm really grateful to have started the game and to have been able to provide Isco with the assist, although there are things that I can improve on. I'm really pleased with the win and for the whole team.
"I feel very comfortable with Zidane and hope to continue to play my part and give my all for this club. There's great unity within the dressing room and there are a lot of good players and world stars and we're all happy that we're all involved. You learn new things from them every day and I feel right at home."