Turk Telekom were beaten for only the second time this season as they lost 79-72 to hosts Efes Pilsen on Sunday.
Marcus Haislip poured in 29 points for the winners who improve to 18-2 - the same record of Turk Telekom and Fenerbahce Ulker. Drew Nicholas scored 19 for Efes Pilsen while Erwin Dudley led the losers with 22.
The platform for the win was built in the second quarter which Efes took 24-13.
Fener had won on Saturday with a 94-76 triumph against Banvit built on the back of 26 points from Ira Clark and 18 from Willie Solomon.
Besiktas Cola Turka were edged 83-81 by Darussafaka, who won the final quarter 16-14, while Galatasaray Cafe Crown saw off CASA Ted Kolejliler 91-86.
Oyak Renaul lost 81-78 to visitors Beykozspor while Pinar Karsiyaka outlasted Tekelspor 60-50.
Alpella beat Tofas 64-62 while Mutlu Aku Selcuk eclipsed Mersin BSB 87-82 thanks largely to 29 points from Brian Boddicker.