Galatasaray have moved six points clear at the top of the Super Lig table following a 1-0 home win over Kayserispor.
Felipe Melo scored the Saturday game’s only goal on 32 minutes to put pressure on second-placed Fenerbahce, who travel to struggling Karabukspor.
Fifth-placed Genclerbirligi tripped up 2-1 at home to Mersin Idmanyurdu.
Wissem Ben Yahia opened the scoring on 54 minutes before Marcio Nobre’s 90th-minute strike proved crucial when Randall Azofeifa responded with a penalty in the first minute of injury time.