Fenerbahce came back from a 15-point deficit and won the battle against CSKA Moscow (79-75) to remain on top of the standings.
Four crucial points by Jan Vesely and Kostas Sloukas and a turnover by Alec Peters helped Fenerbahce win the game, which was decided in the final minute.
The Muscovites had control of the match in the beginning and led by as many as 15 points in the contest (33-48).
An impressive 19-0 run let the hosts turn things around and take a two-point advantage (52-50).
The visitors, though, went on an 8-17 run of their own to regain the lead (60-67). Fenerbahce came back again and tied the game (75-75).
With the momentum on their side, the hosts stood tall and earned a big win at home (79-75) in a battle between two of the favourites to go all the way.
Vesely (19 points, 10 rebounds) and Marko Guduric (15 points) led the winners in scoring.
Will Clyburn had a team-high 17 points for the losing squad, as Cory Higgins added 12.
This was the ninth straight win for Fenerbahce in the EuroLeague (12-1), whereas CSKA Moscow lost for just the third time this season (10-3).