Playing at home, Gencler capitalized on a weakened Galtasaray line up to score deep into the second half, with Burhan finding the back of the visitors net in the 71st minute.
However, Galatasaray, who were without a number of their regular starting eleven as well as their ailing German coach Karl Heinz Feldkamp, are still well in the hunt for a spot in the final, with the return leg to be played in Istanbul on April 16.