The victory in the derby means that Vakifbank has now won big against the two biggest rivals in a short time.
As recently as February 8, the series three and Champions League quarterfinalist Eczacibasi were defeated 3-0 in sets.
Then Haak accounted for 27 points, also this time she became the best scorer in the team when she got 18 points from the series final against Fenerbahce.
The victory means that Vakifbank has now secured its first place in the table.