Rasmus Falk scored the all-important winner in the 79th-minute assisted by Jonas Wind as they came from behind twice to win 3-2.
Bundu, 23, who subbed on in the 46th minute to replace Pep Biel was impressive on his debut and has received a laudable reception after the game.
The win means Copenhagen standing sixth on the 3F Superliga table as travel to Hornes on Sunday.
AAB Goals – Rasmus Thelander (10 “) , Marcus Hannebo (39”)
FC COPENHAGEN Goals – Karlo Bartolec (53 “), Jens Stage (58 “), Rasmus Falk (79 “)
By Alusine Rehme Wilson – Connect with us @football_sierra, on Facebook/ Instagram Football Sierra Leone.