Olympiakos edged even closer to a top-four finish in the regular season of the Euroleague after thrashing Baskonia at home on Friday, while Panathinaikos will likely have to settle for a spot between the fifth and the eighth after suffering a bad reverse at Fenerbahce on Thursday.
The Reds demolished ambitious Baskonia 92-62 in Piraeus to shake off their loss to Panathinaikos four days earlier and stay joint second in the Euroleague with 13 wins and five defeats.
Olympiakos had three Greek players score 12 points each: Vassilis Spanoulis, Costas Papanikolaou and Giorgos Printezis.
The Greens, on the other hand, went down 84-63 at Fenerbahce as they appeared to have rested on their laurels from their Cup win at Olympiakos.
The result has left Panathinaikos sixth, with 10 wins in 18 games, level on points with seventh Red Star Belgrade and eighth Darussafaka.