# 2024 Zagreb Open – Men's singles

Filip Misolic was the defending champion but lost in the second round to Oriol Roca Batalla.
Damir Džumhur won the title after defeating Luka Mikrut 7–5, 6–0 in the final.

## Seeds

* Damir Džumhur (champion)
* Nicolas Moreno de Alboran (first round)
* Oriol Roca Batalla (semifinals)
* Marco Trungelliti (withdrew)
* Quentin Halys (first round)
* Genaro Alberto Olivieri (first round)
* Nick Hardt (quarterfinals)
* Henrique Rocha (second round)
* Dino Prižmić (second round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Damir Džumhur | 4 | 6 | 6 | | | | |
| 3 | Oriol Roca Batalla | 6 | 4 | 4 | | | | |
| 3 | Oriol Roca Batalla | 6 | 4 | 4 | 1 | Damir Džumhur | 7 | 6 |
| | | | | | WC | Luka Mikrut | 5 | 0 |
| WC | Matej Dodig | 7$^7$ | 2 | 2 | WC | Luka Mikrut | 5 | 0 |
| WC | Luka Mikrut | 6$^4$ | 6 | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | D Džumhur | 5 | 6 | 6 | | | | | | | | | | | | | | |
| | D Jordà Sanchis | 7 | 4 | 2 | 1 | D Džumhur | 6 | 4 | 6 | | | | | | | | | |
| | N Fatić | 6 | 0 | | | N Fatić | 2 | 6 | 3 | | | | | | | | | |
| | A Andreev | 1 | 0$^r$ | | | | | | | 1 | D Džumhur | 6 | 6 | | | | | |
| Q | Mathys Erhard | 7 | 6 | | | | | | | 7 | N Hardt | 3 | 4 | | | | | |
| | D Rincón | 5 | 2 | | Q | M Erhard | 3 | 2 | | | | | | | | | | |
| | Y Demin | 7$^8$ | 2 | 1 | 7 | N Hardt | 6 | 6 | | | | | | | | | | |
| 7 | N Hardt | 6$^6$ | 6 | 6 | | | | | | | | | | 1 | D Džumhur | 4 | 6 | 6 |
| 3 | O Roca Batalla | 7$^8$ | 6 | | | | | | | | | | | 3 | O Roca Batalla | 6 | 4 | 4 |
| Q | G Elias | 6$^6$ | 4 | | 3 | O Roca Batalla | 6 | 7$^7$ | | | | | | | | | | |
| Q | A Zakharov | 6$^5$ | 7 | 3 | | F Misolic | 4 | 6$^5$ | | | | | | | | | | |
| | F Misolic | 7$^7$ | 5 | 6 | | | | | | 3 | O Roca Batalla | 6 | 6 | | | | | |
| | E Dalla Valle | 6 | 6 | | | | | | | | E Dalla Valle | 3 | 2 | | | | | |
| Alt | R Noguchi | 3 | 3 | | | E Dalla Valle | 7$^7$ | 6 | | | | | | | | | | |
| | F Maestrelli | 2 | 6 | 6 | | F Maestrelli | 6$^4$ | 2 | | | | | | | | | | |
| 5 | Q Halys | 6 | 4 | 4 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | GA Olivieri | 1 | 2 | | | | | | | | | | | | | | | | |
| Q | N Serdarušić | 6 | 6 | | Q | N Serdarušić | 6 | 1 | 2 | | | | | | | | | | |
| Q | C Taberner | 3 | 6 | 1 | WC | M Dodig | 4 | 6 | 6 | | | | | | | | | | |
| WC | M Dodig | 6 | 0 | 6 | | | | | | WC | M Dodig | 7 | 4 | 6 | | | | | |
| | R Olivo | 7$^7$ | 2 | 5 | | | | | | | D Popko | 5 | 6 | 4 | | | | | |
| | D Popko | 6$^2$ | 6 | 7 | | D Popko | 6 | 6 | | | | | | | | | | | |
| | A Dougaz | 3 | 6 | 5 | 9 | D Prižmić | 2 | 4 | | | | | | | | | | | |
| 9 | D Prižmić | 6 | 3 | 7 | | | | | | | | | | | WC | M Dodig | 7$^7$ | 2 | 2 |
| 8 | H Rocha | 6 | 6 | | | | | | | | | | | | WC | L Mikrut | 6$^4$ | 6 | 6 |
| PR | N Álvarez Varona | 3 | 4 | | 8 | H Rocha | 3 | 2 | | | | | | | | | | | |
| WC | Roko Horvat | 1 | 6$^2$ | | WC | L Mikrut | 6 | 6 | | | | | | | | | | | |
| WC | L Mikrut | 6 | 7$^7$ | | | | | | | WC | L Mikrut | 6 | 2 | 7 | | | | | |
| Q | G den Ouden | 6 | 5 | 6$^5$ | | | | | | | R Pacheco Méndez | 3 | 6 | 5 | | | | | |
| | E Couacaud | 3 | 7 | 7$^7$ | | E Couacaud | 7$^7$ | 5 | 2 | | | | | | | | | | |
| | R Pacheco Méndez | 6 | 6 | | | R Pacheco Méndez | 6$^1$ | 7 | 6 | | | | | | | | | | |
| 2 | N Moreno de Alboran | 4 | 3 | | | | | | | | | | | | | | | | |