Panathinaikos had the first match point to qualify for the Euroleague final tournament - they did not use it in Istanbul, the second one awaits them in Athens.
Anadolu Efes survived, defeating the reigning European champion in the fourth game to tie the series - it was 85:82 and has a chance to accomplish the feat on Tuesday at the OAKA Arena.
The Turkish team was in control for 25 minutes, and after being down 10 in the third quarter, PAO responded with a 10:0 run and then took the lead on the wings of Kostas Slukas.
However, the finish went to the home team, with Elijah Bryant, PJ Dowger and Rolands Schmits coming out on top and deciding the winner.
Bryant had 19 points, Schmits 15, and Ercan Osmani 14 for Efes, while the best for the "greens" was Cedi Osman with 22.
Fenerbahce awaits the winner of the Panathinaikos - Anadolu Efes duel in the semifinals of the Final Four, and Olympiacos does not yet know its rival because the match between Barcelona and Monaco will also be played by a master.
"Blaugrana" defeated Vasilis Spanoulis' team for the second time on home soil and returned the series to the Principality - tonight it was 79:72.
Jabari Parker led the Catalans with 22 points, while Mike James (16) stood out for the visitors.
The Masters is played on Wednesday.
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