Fenerbahce nosed in front in the Turkish Super Lig with a 1-0 win over Mersin Idmanyurdu.
With Besiktas not in action until Monday's (AEDT) trip to Konyaspor, Fener took over at the top of the table by a single point with the win, which came courtesy of Mehmet Topal's 32nd-minute goal.
Istanbul Buyuksehir is fourth, six points from the summit, after a 3-1 win over Kayseri Erciyesspor.
Alexandru Epureanu put his side ahead after 17 minutes and although Edinho levelled at the start of the second half, goals from Doka Madureira and Jeremy Perbet in the final 20 minutes won it for the host.
A last-gasp goal from Gokhan Unal saw Balikesirspor move off the foot of the table with a much-needed 1-0 away win over Karabukspor - only its second victory of the season.