[2] The first qualifying tournament featured hosts Valencia Basket, 2015–2016 champions Barcelona, Herbalife Gran Canaria, Unicaja, Joventut, all from Spain, LDLC ASVEL and Nanterre 92 from France, and ratiopharm Ulm from Germany.

The second qualifying tournament featured hosts Fenerbahçe Beko and Anadolu Efes, as well as Tofaş Bursa, all from Turkey, the 2018–19 champions Real Madrid and Casademont Zaragoza from Spain, Stella Azzurra from Italy, Žalgiris from Lithuania and Basket Brno from Czech Republic.

Real Madrid won 85–77 against Stella Azzurra to advance to the final tournament.

The third qualifying tournament featured hosts Crvena zvezda mts, Partizan NIS and Mega Soccerbet, as well as Budućnost VOLI Podgorica from Montenegro, Cedevita Olimpija from Slovenia, Lokomotiv Kuban from Russia, Maccabi Tel Aviv from Israel and U-BT Cluj-Napoca from Romania.

Mega Soccerbet won 82–80 against Crvena zvezda mts to advance to the final tournament.