Olympiakos, who hosted Monaco at Gaston Medecin Hall in the third match of the series, defeated its opponent 105-82 and won the series 3-0.
The Greek team will face the winner of the Fenerbahçe Beko-Zalgiris match in the Final Four.
Evan Fournier scored 22 points, 5 assists, 2 rebounds in Olympiakos, Alec Peters scored 18 points and 6 rebounds, while Matthew Strazel scored 21 points and Jaron Blossomgame scored 19 points in Monaco.
Defeating Real Madrid 76-69 in the other match of the night, Hapoel IBI Tel Aviv got its first victory and made the series 2-1. The fourth match of the series will be played on Thursday, May 7.
The teams that achieve 3 wins in their series will advance to the Final Four, which will be hosted by Athens, the capital of Greece.
