| Prevseason: | 2019–20 |
| Nextseason: | 2021–22 |
| ANGT | |
| Season: | 2020–21 |
| Champions: |  Real Madrid |
| Runners Up: | Barcelona |
| Teams: | 24 |
| Duration: | 27 December 2020–6 June 2021 |
| Mvp: | Eli Ndiaye (Real Madrid) |
The 2020–21 Euroleague Basketball Next Generation Tournament, also called Adidas Next Generation Tournament by sponsorship reasons, is the 19th edition of the international junior basketball tournament organized by Euroleague Basketball.[1]
In this edition, the number of the participating under-18 teams was reduced to 24. They will play in three qualifying tournaments between December 2020 and February 2021. CFBB Paris was supposed to participate, but was replaced by Tofaş Bursa.[2]
| width=210 | width=210 | Valencia Basket | width=210 |  Partizan NIS | width=210 |  Lokomotiv Kuban | |
| width=210 | width=210 |  Tofaş | width=210 |  LDLC ASVEL | width=210 |  Basket Brno | |
| width=210 | Herbalife Gran Canaria | width=210 | Anadolu Efes | width=210 | Nanterre 92 | width=210 |  Žalgiris |
| width=210 | width=210 | Fenerbahçe Beko | width=210 |  Budućnost VOLI Podgorica | width=210 | ||
| width=210 | Real Madrid | width=210 | width=210 |  Stella Azzurra | width=210 | ratiopharm Ulm | |
| width=210 | width=210 | Mega Soccerbet | width=210 |  Cedevita Olimpija | width=210 |  U-BT Cluj-Napoca | |
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. Barcelona defeated Joventut 79–55 in the final and advanced to the final tournament.
| Qualified to the Final tournament |
| Rank | Team |
|---|---|
| 1 | Barcelona |
| 2 | Joventut |
| 3 | ratiopharm Ulm |
| 4 | Unicaja |
| 5 | Herbalife Gran Canaria |
| 6 | LDLC ASVEL |
| 7 | Valencia Basket |
| 8 | Nanterre 92 |
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.
| Qualified to the Final tournament |
| Rank | Team |
|---|---|
| 1 | Real Madrid |
| 2 | Stella Azzurra |
| 3 | Žalgiris |
| 4 | Anadolu Efes |
| 5 | Casademont Zaragoza |
| 6 | Fenerbahçe Beko |
| 7 | Basket Brno |
| 8 | Tofaş |
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.
| Qualified to the Final tournament |
| Rank | Team |
|---|---|
| 1 | Mega Soccerbet |
| 2 | Crvena zvezda mts |
| 3 | Partizan NIS |
| 4 | Budućnost VOLI Podgorica |
| 5 |  Maccabi Tel Aviv |
| 6 | |
| 7 | Lokomotiv Kuban |
| 8 | U-BT Cluj-Napoca |
The Final tournament was played between 3 and 6 June 2021 in Valencia, Spain.
| width=13% | Host team | width=13% | Qualified teams | width=13% | Invited teams |
|---|---|---|---|---|---|
| Valencia Basket | Barcelona Real Madrid Mega Soccerbet | LDLC ASVEL Crvena zvezda mts Žalgiris Stella Azzurra |
Kymany Houinsou (LDLC ASVEL) Nikola Đurišić (Mega Soccerbet)
James Nnaji (Barcelona) Michael Caicedo (Barcelona) Eli Ndiaye (Real Madrid)