| VfB Friedrichshafen, Germany withdrew. | | | | Winners of each of 5 Groups advance to Quarter-Finals (1/4). Second placed teams and best Third advance to Play-Offs. | | |
| date | time | team 1 | | score | team 2 | | points | set 1 | set 2 | set 3 | set 4 | set 5 | dur | att. | | Wed 22.11.23 | 18:00 | ZAKSA Kędzierzyn-Koźle |  POL | 3-1 | Olympiacos Piraeus |  GRE | 107-100 | 23-25 | 25-20 | 28-26 | 31-29 | | -:-- | ---- | | Thu 23.11.23 | 20:30 | Knack Roeselare |  BEL | 1-3 | Ziraat Bank Ankara |  TUR | 92-96 | 19-25 | 25-19 | 24-26 | 24-26 | | -:-- | ---- | | Wed 29.11.23 | 19:00 | Olympiacos Piraeus | GRE | 0-3 | Knack Roeselare | BEL | 58-75 | 19-25 | 20-25 | 19-25 | | -:-- | ---- | | Wed 29.11.23 | 20:00 | Ziraat Bank Ankara | TUR | 3-2 | ZAKSA Kędzierzyn-Koźle | POL | 103-108 | 26-24 | 25-22 | 18-25 | 19-25 | 15-12 | -:-- | ---- | | Tue 12.12.23 | 19:00 | Olympiacos Piraeus | GRE | | Ziraat Bank Ankara | TUR | | Wed 13.12.23 | 20:30 | Knack Roeselare | BEL | | ZAKSA Kędzierzyn-Koźle | POL | | Tue 19.12.23 | 18:00 | ZAKSA Kędzierzyn-Koźle | POL | | Ziraat Bank Ankara | TUR | | Wed 20.12.23 | 20:30 | Knack Roeselare | BEL | | Olympiacos Piraeus | GRE | | Wed 10.01.24 | 17:00 | Ziraat Bank Ankara | TUR | | Knack Roeselare | BEL | | Thu 11.01.24 | 19:30 | Olympiacos Piraeus | GRE | | ZAKSA Kędzierzyn-Koźle | POL | | Wed 17.01.24 | 20:00 | Ziraat Bank Ankara | TUR | | Olympiacos Piraeus | GRE | | Wed 17.01.24 | 20:30 | ZAKSA Kędzierzyn-Koźle | POL | | Knack Roeselare | BEL |
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| date | time | team 1 | | score | team 2 | | points | set 1 | set 2 | set 3 | set 4 | set 5 | dur | att. | | Thu 23.11.23 | 18:00 | Asseco Resovia | POL | 1-3 | Tours VB |  FRA | 91-96 | 22-25 | 23-25 | 25-21 | 21-25 | | -:-- | ---- | | Thu 23.11.23 | 20:30 | Itas Trentino |  ITA | 3-1 | ACH Volley Ljubljana |  SLO | 96-82 | 25-15 | 20-25 | 25-18 | 26-24 | | -:-- | ---- | | Wed 29.11.23 | 18:00 | ACH Volley Ljubljana | SLO | 0-3 | Asseco Resovia | POL | 65-75 | 21-25 | 23-25 | 21-25 | | -:-- | ---- | | Wed 29.11.23 | 20:00 | Tours VB | FRA | 1-3 | Itas Trentino | ITA | 83-98 | 17-25 | 22-25 | 25-23 | 19-25 | | -:-- | ---- | | Wed 13.12.23 | 18:00 | Asseco Resovia | POL | | Itas Trentino | ITA | | Wed 13.12.23 | 18:00 | ACH Volley Ljubljana | SLO | | Tours VB | FRA | | Thu 21.12.23 | 18:00 | Asseco Resovia | POL | | ACH Volley Ljubljana | SLO | | Thu 21.12.23 | 20:00 | Itas Trentino | ITA | | Tours VB | FRA | | Tue 09.01.24 | 20:30 | Tours VB | FRA | | Asseco Resovia | POL | | Wed 10.01.24 | 18:00 | ACH Volley Ljubljana | SLO | | Itas Trentino | ITA | | Wed 17.01.24 | 20:00 | Tours VB | FRA | | ACH Volley Ljubljana | SLO | | Wed 17.01.24 | 20:30 | Itas Trentino | ITA | | Asseco Resovia | POL |
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| date | time | team 1 | | score | team 2 | | points | set 1 | set 2 | set 3 | set 4 | set 5 | dur | att. | | Wed 22.11.23 | 20:00 | Gas Sales Daiko Piacenza | ITA | 1-3 | Halkbank Ankara | TUR | 83-94 | 19-25 | 18-25 | 25-19 | 21-25 | | -:-- | ---- | | Thu 23.11.23 | 19:30 | Berlin Recycling Volleys |  GER | 3-0 | Sport Lisboa e Benfica |  POR | 77-65 | 27-25 | 25-19 | 25-21 | | -:-- | ---- | | Wed 29.11.23 | 17:00 | Halkbank Ankara | TUR | 3-2 | Berlin Recycling Volleys | GER | 107-108 | 19-25 | 25-21 | 19-25 | 29-27 | 15-10 | | Thu 30.11.23 | 20:00 | Sport Lisboa e Benfica | POR | | Gas Sales Daiko Piacenza | ITA | | Wed 13.12.23 | 20:30 | Gas Sales Daiko Piacenza | ITA | | Berlin Recycling Volleys | GER | | Thu 14.12.23 | 18:00 | Halkbank Ankara | TUR | | Sport Lisboa e Benfica | POR | | Wed 20.12.23 | 19:30 | Berlin Recycling Volleys | GER | | Halkbank Ankara | TUR | | Wed 20.12.23 | 20:30 | Gas Sales Daiko Piacenza | ITA | | Sport Lisboa e Benfica | POR | | Wed 10.01.24 | 20:00 | Sport Lisboa e Benfica | POR | | Berlin Recycling Volleys | GER | | Wed 10.01.24 | 20:00 | Halkbank Ankara | TUR | | Gas Sales Daiko Piacenza | ITA | | Wed 17.01.24 | 19:00 | Sport Lisboa e Benfica | POR | | Halkbank Ankara | TUR | | Wed 17.01.24 | 19:30 | Berlin Recycling Volleys | GER | | Gas Sales Daiko Piacenza | ITA |
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| date | time | team 1 | | score | team 2 | | points | set 1 | set 2 | set 3 | set 4 | set 5 | dur | att. | | Wed 22.11.23 | 19:00 | SVG Lüneburg | GER | 3-0 | Jihostroj České Budějovice |  CZE | 76-59 | 26-24 | 25-20 | 25-15 | | -:-- | ---- | | Wed 22.11.23 | 20:30 | Jastrzębski Węgiel | POL | 3-0 | Guaguas Las Palmas |  ESP | 81-68 | 30-28 | 25-16 | 26-24 | | -:-- | ---- | | Tue 28.11.23 | 17:00 | Jihostroj České Budějovice | CZE | 0-3 | Jastrzębski Węgiel | POL | 72-82 | 19-25 | 27-29 | 26-28 | | -:-- | ---- | | Wed 29.11.23 | 19:30 | Guaguas Las Palmas | ESP | 1-3 | SVG Lüneburg | GER | 88-96 | 20-25 | 23-25 | 25-21 | 20-25 | | -:-- | ---- | | Wed 13.12.23 | 19:00 | SVG Lüneburg | GER | | Jastrzębski Węgiel | POL | | Wed 13.12.23 | 19:30 | Guaguas Las Palmas | ESP | | Jihostroj České Budějovice | CZE | | Wed 20.12.23 | 18:00 | Jastrzębski Węgiel | POL | | Jihostroj České Budějovice | CZE | | Wed 20.12.23 | 19:00 | SVG Lüneburg | GER | | Guaguas Las Palmas | ESP | | Tue 09.01.24 | 17:00 | Jihostroj České Budějovice | CZE | | SVG Lüneburg | GER | | Thu 11.01.24 | 19:30 | Guaguas Las Palmas | ESP | | Jastrzębski Węgiel | POL | | Wed 17.01.24 | 17:00 | Jihostroj České Budějovice | CZE | | Guaguas Las Palmas | ESP | | Wed 17.01.24 | 18:00 | Jastrzębski Węgiel | POL | | SVG Lüneburg | GER |
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| date | time | team 1 | | score | team 2 | | points | set 1 | set 2 | set 3 | set 4 | set 5 | dur | att. | | Wed 22.11.23 | 20:30 | Cucine Lube Civitanova | ITA | 3-0 | CS Arcada Galați |  ROU | 75-59 | 25-17 | 25-19 | 25-23 | | -:-- | ---- | | Wed 22.11.23 | 20:30 | Greenyard Maaseik | BEL | 0-3 | Lvi Praha | CZE | 68-76 | 22-25 | 24-26 | 22-25 | | -:-- | ---- | | Wed 29.11.23 | 18:00 | CS Arcada Galați | ROU | 1-3 | Greenyard Maaseik | BEL | 85-98 | 20-25 | 25-23 | 17-25 | 23-25 | | -:-- | ---- | | Thu 30.11.23 | 18:00 | Lvi Praha | CZE | 0-3 | Cucine Lube Civitanova | ITA | 62-75 | 22-25 | 17-25 | 23-25 | | -:-- | ---- | | Tue 12.12.23 | 20:30 | Greenyard Maaseik | BEL | | Cucine Lube Civitanova | ITA | | Thu 14.12.23 | 18:00 | CS Arcada Galați | ROU | | Lvi Praha | CZE | | Thu 21.12.23 | 20:30 | Cucine Lube Civitanova | ITA | | Lvi Praha | CZE | | Thu 21.12.23 | 20:30 | Greenyard Maaseik | BEL | | CS Arcada Galați | ROU | | Tue 09.01.24 | 18:00 | CS Arcada Galați | ROU | | Cucine Lube Civitanova | ITA | | Thu 11.01.24 | 18:00 | Lvi Praha | CZE | | Greenyard Maaseik | BEL | | Wed 17.01.24 | 19:30 | Lvi Praha | CZE | | CS Arcada Galați | ROU | | Wed 17.01.24 | 20:30 | Cucine Lube Civitanova | ITA | | Greenyard Maaseik | BEL |
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| | Groups Ranking | | won | lost | pts | sets | points | m | | 1. | Cucine Lube Civitanova | ITA | 2 | 0 | 6 | 6:0 max | 150/121 1.240 | 2 | | 2. | Jastrzębski Węgiel | POL | 2 | 0 | 6 | 6:0 max | 163/140 1.164 | 2 | | 3. | SVG Lüneburg | GER | 2 | 0 | 6 | 6:1 6.00 | 172/147 1.170 | 2 | | 4. | Itas Trentino | ITA | 2 | 0 | 6 | 6:2 3.00 | 194/165 1.176 | 2 | | 5. | Halkbank Ankara | TUR | 2(1) | 0 | 5 | 6:3 2.00 | 201/191 1.052 | 2 | | 6. | Ziraat Bank Ankara | TUR | 2(1) | 0 | 5 | 6:3 2.00 | 199/200 0.995 | 2 | | 7. | Berlin Recycling Volleys | GER | 1 | 1(1) | 4 | 5:3 1.67 | 185/172 1.076 | 2 | | 8. | ZAKSA Kędzierzyn-Koźle | POL | 1 | 1(1) | 4 | 5:4 1.25 | 215/203 1.059 | 2 | | 9. | Knack Roeselare | BEL | 1 | 1 | 3 | 4:3 1.33 | 167/154 1.084 | 2 | | 10. | Asseco Resovia | POL | 1 | 1 | 3 | 4:3 1.33 | 166/161 1.031 | 2 | | 11. | Lvi Praha | CZE | 1 | 1 | 3 | 3:3 1.00 | 138/143 0.965 | 2 | | 12. | Tours VB | FRA | 1 | 1 | 3 | 4:4 1.00 | 179/189 0.947 | 2 | | 13. | Greenyard Maaseik | BEL | 1 | 1 | 3 | 3:4 0.75 | 166/161 1.031 | 2 | | 14. | Gas Sales Daiko Piacenza | ITA | 0 | 1 | 0 | 1:3 0.33 | 83/94 0.883 | 1 | | 15. | Guaguas Las Palmas | ESP | 0 | 2 | 0 | 1:6 0.17 | 156/177 0.881 | 2 | | 16. | Olympiacos Piraeus | GRE | 0 | 2 | 0 | 1:6 0.17 | 158/182 0.868 | 2 | | 17. | ACH Volley Ljubljana | SLO | 0 | 2 | 0 | 1:6 0.17 | 147/171 0.860 | 2 | | 18. | CS Arcada Galați | ROU | 0 | 2 | 0 | 1:6 0.17 | 144/173 0.832 | 2 | | 19. | Sport Lisboa e Benfica | POR | 0 | 1 | 0 | 0:3 0.00 | 65/77 0.844 | 1 | | 20. | Jihostroj České Budějovice | CZE | 0 | 2 | 0 | 0:6 0.00 | 131/158 0.829 | 2 |
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