| Croatia Open | |
| Founded: | 1990 |
| Editions: | 33 (2023) |
| City: | Umag |
| Country: | Croatia |
| Category: | ATP Tour 250 / ATP International Series / ATP World Series (1990–current) |
| Venue: | ITC Stella Maris |
| Surface: | Clay / outdoors |
| Draw: | 28S/16Q/16D |
| Prize Money: | €579,320 (2024) |
| Completed Event: | 2024 |
| Singles: |  Francisco Cerúndolo |
| Doubles: | Guido Andreozzi Miguel Ángel Reyes-Varela |
The Croatia Open (currently sponsored by Plava laguna) is a men's ATP tennis tournament held in Umag, Croatia that is part of the 250 series of the ATP Tour.
The tournament began in 1990 when it was part of Yugoslavia, and is the oldest tennis tournament in Croatia. It began as the Yugoslav Open and has been played every year since. It is played on outdoor red clay courts. Carlos Moyá has won the tournament a record five times; he also holds the record for the most consecutive wins at three. His most recent win was in 2007. In 2016, the centre court stadium was named after Croatian tennis player Goran Ivanišević.
| Year | Champions | Runners-up | Score | |
|---|---|---|---|---|
| 6–3, 4–6, 6–4 | ||||
| 6–4, 6–4 | ||||
| 6–1, 4–6, 6–4 | ||||
 Thomas Muster (2) | 7–5, 3–6, 6–3 | |||
| 6–2, 6–4 | ||||
| Thomas Muster (3) | 3–6, 7–6(7–5), 6–4 | |||
| 6–0, 7–6(7–4) | ||||
| 6–3, 7–5 | ||||
| 6–3, 7–6(7–0) | ||||
| 6–2, 6–4 | ||||
| 7–6(7–1), 4–6, 6–3 | ||||
 Carlos Moyá (2) | 6–4, 3–6, 7–6(7–2) | |||
| Carlos Moyá (3) | 6–2, 6–3 | |||
| Carlos Moyá (4) | 6–4, 3–6, 7–5 | |||
| 7–5, 6–3 | ||||
| 6–2, 4–6, 6–2 | ||||
| 6–6(1–3), retired | ||||
| Carlos Moyá (5) | 6–4, 6–2 | |||
| 3–6, 6–4, 7–6(7–4) | ||||
| 6–3, 6–0 | ||||
| 6–4, 6–4 | ||||
| 6–4, 3–6, 6–3 | ||||
| 6–4, 6–2 | ||||
| 6–0, 6–3 | ||||
| 6–3, 6–4 | ||||
| 6–4, 6–1 | ||||
| 6–4, 6–1 | ||||
| 6–4, 6–2 | ||||
| 6–2, 7–6(7–4) | ||||
| 7–5, 7–5 | ||||
| style=background: | 2020 | Not held due to COVID-19 pandemic | ||
| 6–2, 6–2 | ||||
| 6–7(5–7), 6–1, 6–1 | ||||
| 6–7(5–7), 6–3, 6–4 |
| Year | Champions | Runners-up | Score | |
|---|---|---|---|---|
| 6–4, 6–4 | ||||
| 7–6, 2–6, 6–1 | ||||
| 6–3, 6–7, 7–6 | ||||
| 6–4, 7–5 | ||||
| 6–2, 6–4 | ||||
| Luis Lobo Javier Sánchez (2) | 6–4, 6–0 | |||
| Pablo Albano Luis Lobo (2) | 6–4, 6–1 | |||
| 7–6, 6–4 | ||||
| 6–1, 3–6, 6–3 | ||||
| Mariano Puerta Javier Sánchez (3) | 3–6, 6–2, 6–3 | |||
| 6–1, 7–6(7–2) | ||||
| 6–2, 7–5 | ||||
| 6–4, 6–4 | ||||
| 6–1, 6–3 | ||||
| 2004 | 4–6, 6–2, 6–4 | |||
| 6–3, 6–3 | ||||
| 6–4, 6–4 | ||||
| 6–1, 6–1 | ||||
 Michal Mertiňák (2)  Petr Pála (2) | 2–6, 6–3, [10–5] | |||
| František Čermák (2) Michal Mertiňák (3) | 6–4, 6–4 | |||
| 6–3, 7–6(9–7) | ||||
| 6–3, 5–7, [10–7] | ||||
| 6–3, 7–6(7–4) | ||||
| Martin Kližan David Marrero (2) | 6–1, 5–7, [10–7] | |||
| 6–4, 7–6(7–5) | ||||
| 4–6, 6–3, [10–5] | ||||
| Martin Kližan (2) David Marrero (3) | 6–4, 6–2 | |||
| 6–3, 6–7(4–7), [10–6] | ||||
| 6–4, 6–4 | ||||
| 7–5, 6–7(2–7), [14–12] | ||||
| style=background: | 2020 | Not held due to COVID-19 pandemic | ||
| 6–3, 7–5 | ||||
 Simone Bolelli (2) Fabio Fognini (2) |  Lloyd Glasspool Harri Heliövaara | 5–7, 7–6(8–6), [10–7] | ||
| Simone Bolelli Andrea Vavassori | 4–6, 7–6(7–2), [15–13] |