| Men's singles | |
|---|---|
| 2024 Lisboa Belém Open | |
| Champion |  Alexander Ritschard |
| Runner-up |  Raphaël Collignon |
| Score | 6–3, 6–7(3–7), 6–3 |
Flavio Cobolli was the defending champion [1] but chose not to defend his title.
Alexander Ritschard won the title after defeating Raphaël Collignon 6–3, 6–7(3–7), 6–3 in the final.
Thiago Monteiro (withdrew)
Daniel Altmaier (first round) Thiago Seyboth Wild (first round)
Thiago Agustín Tirante (quarterfinals)
Jozef Kovalík (second round)
Laslo Djere (withdrew) Alexander Ritschard (champion)
Daniel Elahi Galán (first round)
Andrea Pellegrino (first round)| Semifinals | Final | ||||||||||||
| Raphaël Collignon | 62 | 6 | 6 | ||||||||||
| LL |  Elmer Møller | 77 | 2 | 4 | |||||||||
| Raphaël Collignon | 3 | 77 | 3 | ||||||||||
| 7 | Alexander Ritschard | 6 | 63 | 6 | |||||||||
 Emilio Nava | 63 | 0 | |||||||||||
| 7 | Alexander Ritschard | 77 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| LL |  Sandro Kopp | 3 | 3 | ||||||||||||||||||||||||
 M Dodig | 6 | 6 | M Dodig | 6 | 2 | 1 | |||||||||||||||||||||
| Q |  D Rincón | 62 | 4 |  Z Piros | 3 | 6 | 6 | ||||||||||||||||||||
| Z Piros | 77 | 6 | Z Piros | 1 | 0 | ||||||||||||||||||||||
| R Collignon | 7 | 6 | R Collignon | 6 | 6 | ||||||||||||||||||||||
| WC |  G Elias | 5 | 3 | R Collignon | 6 | 6 | |||||||||||||||||||||
| Q | M Kližan | 3 | 66 | 5 | J Kovalík | 3 | 3 | ||||||||||||||||||||
| 5 | J Kovalík | 6 | 78 | R Collignon | 62 | 6 | 6 | ||||||||||||||||||||
| 4 | TA Tirante | 6 | 77 | LL | E Møller | 77 | 2 | 4 | |||||||||||||||||||
| Q | E Dalla Valle | 4 | 64 | 4 | TA Tirante | 6 | 6 | ||||||||||||||||||||
| WC | F Ferreira Silva | 4 | 6 | 6 | WC | F Ferreira Silva | 3 | 1 | |||||||||||||||||||
 T Skatov | 6 | 2 | 2 | 4 | TA Tirante | 4 | 6 | 3 | |||||||||||||||||||
| O Roca Batalla | 7 | 6 | LL | E Møller | 6 | 4 | 6 | ||||||||||||||||||||
| J Faria | 5 | 2 | O Roca Batalla | 3 | 0r | ||||||||||||||||||||||
| LL | E Møller | 6 | 6 | LL | E Møller | 6 | 1 | ||||||||||||||||||||
| 9 | A Pellegrino | 3 | 1 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | DE Galán | 62 | 6 | 64 | |||||||||||||||||||||||
| Q | G Fonio | 77 | 4 | 77 | Q | G Fonio | 3 | 3 | |||||||||||||||||||
| E Nava | 6 | 6 | E Nava | 6 | 6 | ||||||||||||||||||||||
 V Gaubas | 4 | 3 | E Nava | 6 | 6 | ||||||||||||||||||||||
| Alt | F Arnaboldi | 77 | 6 | H Rocha | 1 | 2 | |||||||||||||||||||||
| WC | D Vale | 65 | 1 | Alt | F Arnaboldi | 2 | 6 | 0 | |||||||||||||||||||
| H Rocha | 77 | 6 | H Rocha | 6 | 2 | 6 | |||||||||||||||||||||
| 3 | T Seyboth Wild | 64 | 3 | E Nava | 63 | 0 | |||||||||||||||||||||
| 7 | A Ritschard | 7 | 4 | 6 | 7 | A Ritschard | 77 | 6 | |||||||||||||||||||
 Arthur Gea | 5 | 6 | 4 | 7 | A Ritschard | 6 | 6 | ||||||||||||||||||||
| Q | D Novak | 64 | 6 | 3 | SE | L Pavlovic | 1 | 1 | |||||||||||||||||||
| SE | Luka Pavlovic | 77 | 3 | 6 | 7 | A Ritschard | 6 | 4 | 6 | ||||||||||||||||||
| LL |  A Andreev | 6 | 3 | 4 |  T Barrios Vera | 3 | 6 | 2 | |||||||||||||||||||
| Q | C Tabur | 3 | 6 | 6 | Q | C Tabur | 3 | 2 | |||||||||||||||||||
| T Barrios Vera | 4 | 6 | 77 | T Barrios Vera | 6 | 6 | |||||||||||||||||||||
| 2 | D Altmaier | 6 | 4 | 65 | |||||||||||||||||||||||
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