Besiktas pulled off the upset of the night after beating Napoli 3-2 at the San Paulo stadium to move into second place in Group B on five points.
Aboubakar was the hero for the Black Eagles scoring his first goal for the club this season when he put his side 2-1 ahead going into half-time.
Napoli did however, find a second half equaliser after converting from the penalty spot – after missing their first spot kick.
Aboubakar had the last last scoring late on to record Besiktas’ first ever victory against Italian opposition in European competition.