| Men's singles | |
|---|---|
| 2024 Zagreb Open | |
| Champion |  Damir Džumhur |
| Runner-up |  Luka Mikrut |
| Score | 7–5, 6–0 |
Filip Misolic was the defending champion [1] 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. [2]
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)| Semifinals | Final | ||||||||||||
| 1 | Damir Džumhur | 4 | 6 | 6 | |||||||||
| 3 | Oriol Roca Batalla | 6 | 4 | 4 | |||||||||
| 1 | Damir Džumhur | 7 | 6 | ||||||||||
| WC | Luka Mikrut | 5 | 0 | ||||||||||
| WC | Matej Dodig | 77 | 2 | 2 | |||||||||
| WC | Luka Mikrut | 64 | 6 | 6 | |||||||||
| First round | Second round | Quarterfinals | 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 | 0r | 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 | 78 | 2 | 1 | 7 | N Hardt | 6 | 6 | ||||||||||||||||||||
| 7 | N Hardt | 66 | 6 | 6 | 1 | D Džumhur | 4 | 6 | 6 | ||||||||||||||||||
| 3 | O Roca Batalla | 78 | 6 | 3 | O Roca Batalla | 6 | 4 | 4 | |||||||||||||||||||
| Q | G Elias | 66 | 4 | 3 | O Roca Batalla | 6 | 77 | ||||||||||||||||||||
| Q | A Zakharov | 65 | 7 | 3 |  F Misolic | 4 | 65 | ||||||||||||||||||||
| F Misolic | 77 | 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 | 77 | 6 | |||||||||||||||||||||
| F Maestrelli | 2 | 6 | 6 | F Maestrelli | 64 | 2 | |||||||||||||||||||||
| 5 | Q Halys | 6 | 4 | 4 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | 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 | 77 | 2 | 5 |  D Popko | 5 | 6 | 4 | ||||||||||||||||||||
| D Popko | 62 | 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 | 77 | 2 | 2 | ||||||||||||||||||
| 8 | H Rocha | 6 | 6 | WC | L Mikrut | 64 | 6 | 6 | |||||||||||||||||||
| PR | N Álvarez Varona | 3 | 4 | 8 | H Rocha | 3 | 2 | ||||||||||||||||||||
| WC | Roko Horvat | 1 | 62 | WC | L Mikrut | 6 | 6 | ||||||||||||||||||||
| WC | L Mikrut | 6 | 77 | WC | L Mikrut | 6 | 2 | 7 | |||||||||||||||||||
| Q |  G den Ouden | 6 | 5 | 65 |  R Pacheco Méndez | 3 | 6 | 5 | |||||||||||||||||||
| E Couacaud | 3 | 7 | 77 | E Couacaud | 77 | 5 | 2 | ||||||||||||||||||||
| R Pacheco Méndez | 6 | 6 | R Pacheco Méndez | 61 | 7 | 6 | |||||||||||||||||||||
| 2 | N Moreno de Alboran | 4 | 3 | ||||||||||||||||||||||||
Dominic Thiem was the defending champion, but chose to compete in Kitzbühel instead.
Kevin Krawietz and Maximilian Marterer were the defending champions but only Marterer chose to defend his title, partnering Nils Langer. Langer and Marterer withdrew in the first round.
Gerard Granollers and Oriol Roca Batalla were the defending champions but only Roca Batalla decided to defend his title, partnering Pedro Martínez. Roca Batalla lost in the quarterfinals to Kevin Krawietz and Maximilian Marterer.
Damir Džumhur defeated Adrian Mannarino in the final, 6–1, 1–6, 6–1, to win the singles title at the 2018 Antalya Open.
Fabio Fognini was the defending champion, but lost in the second round to Jürgen Zopp.
Damir Džumhur was the defending champion, but lost to Egor Gerasimov in the first round.
Ariel Behar and Gonzalo Escobar were the defending champions but only Escobar chose to defend his title, partnering Artem Sitak. Escobar lost in the semifinals to Íñigo Cervantes and Oriol Roca Batalla.
Sebastián Báez was the defending champion but chose not to defend his title.
This was the first edition of the tournament. It was originally supposed to be held in 2020 but was canceled due to the COVID-19 pandemic.
Franco Agamenone was the defending champion but chose not to defend his title.
Stefano Travaglia was the defending champion but chose not to defend his title.
Camilo Ugo Carabelli was the defending champion but chose not to defend his title.
Dušan Lajović was the defending champion but chose not to defend his title.
Matteo Gigante was the defending champion but had to retire in the final.
Shintaro Mochizuki was the defending champion but chose not to defend his title.
Zsombor Piros was the defending champion but lost in the final to Jozef Kovalík.
Sho Shimabukuro was the defending champion but lost in the second round to Clément Tabur.
Francisco Cerúndolo won the singles title at the 2024 Croatia Open Umag, defeating Lorenzo Musetti in the final, 2–6, 6–4, 7–6(7–5). It was his third ATP Tour title.
This was the first edition of the tournament.
Oriol Roca Batalla was the defending champion but withdrew from the tournament before his first round match.