A second half penalty from Umit Davala was enough to hand Luis Fernandez a defeat in his first game back in charge of Paris St Germain.
Galatasary recovered from yesterday's training dispute over late payment of bonuses to continue PSG's poor run of recent form.
PSG had not won in their previous eight games and Fernandez answered the call for help on Sunday to try and save their season after a £55 million outlay on new players in the summer.
Chief among these buy was a French record fee of £22 million to sign Nicolas Anelka and he made a surprise appearance as a substitute for the last twenty minutes but the young forward could not get the visitors back into the match.
Gala are now unbeaten in the second stage after a 2-2 draw in Milan and could offer a Champions League quarter final place to tempt transfer target Franca from Sao Paolo this month if they keep up their good form.
The UEFA Cup holders swarmed over an ill at ease Paris side in the first half but Lionel Letizi was in good form producing a great diving save to deny Hasan Sas midway through the half.
A 30th minute free kick from Emre also saw Letizi sporing across his goal to defy Gala.
The game was settled in the 51st minute when Talal El-Karkouri brought down Mario Jardel in the penalty area and Davala powered in the penalty kick.
A second Champions League defeat for PSG means the French club's priority is now for Fernandez to try and get a league run going during the ten week winter break in the European competition.
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