Fenerbahce warmed up for their Champions League qualifying clash against Arsenal with a shock 3-2 defeat to newly promoted Konyaspor.
The Istanbul giants, playing their first Super Lig game under new coach Ersun Yanal, had led 2-0 at the Konya Ataturk Stadium with under 15 minutes remaining thanks to goals from Joseph Yobo and Emre Belezoglu.
However, the minnows staged a stunning comeback, first though Tomas Borek and Ali Camdali, who struck within minutes of one another, before Recep Aydin completed the victory with minutes remaining.
Emmanuel Emenike, who was re-signed from Spartak Moscow in the close season, squandered a number of chances for the visitors, while the hosts had missed a penalty prior to their revival.
Arsenal, meanwhile, also warmed up for the Sukru Saracoglu clash in far-from-ideal fashion, having Laurent Koscielny sent off as they slumped to a 3-1 home loss to Aston Villa.
Fenerbahce entertain the Gunners at 19.45BST on Wednesday before the two sides clash once more at the Emirates Stadium the following Tuesday.