Yakin added his second from the penalty spot in the 83rd minute after Fernando Meira was adjudged to have fouled Tranquillo Barnetta.
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2.
Yakin had earlier been denied by Turkey goalkeeper Volkan Demirel, who also did well to tip a swerving free-kick by Tranquillo Barnetta around the post.
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3.
Eren Derdiyok came close to equalising in the first half but could only direct his header from Tranquillo Barnetta's left-wing cross straight at Hertha goalkeeper Jaroslav Drobny.