2018 Croatia Open Umag
| 2018 Croatia Open Umag | |
|---|---|
| Date | 15 – 22 July |
| Edition | 29th |
| Category | ATP World Tour 250 |
| Draw | 28S/16D |
| Prize money | €482,060 |
| Surface | Clay |
| Location | Umag, Croatia |
| Champions | |
| Singles | |
 Marco Cecchinato | |
| Doubles | |
 Robin Haase / Matwé Middelkoop | |
The 2018 Croatia Open Umag (also known as the Plava Laguna Croatia Open Umag for sponsorship reasons) was a men's tennis tournament played on outdoor clay courts. It was the 29th edition of the Croatia Open, and part of the ATP World Tour 250 Series of the 2018 ATP World Tour. It took place at the International Tennis Center in Umag, Croatia, from 15 July through 22 July 2018.
ATP singles main draw entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 GBR |
|||
 BIH
|
Damir Džumhur | 23 | 2 |
| ITA
|
Marco Cecchinato | 29 | 3 |
 RUS
|
Andrey Rublev | 33 | 4 |
 ESP
|
Albert Ramos Viñolas | 38 | 5 |
| NED
|
Robin Haase | 43 | 6 |
 POR
|
João Sousa | 45 | 7 |
 FRA
|
Benoît Paire | 47 | 8 |
 GER
|
Maximilian Marterer | 48 | 9 |
Other entrants
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Withdrawals
- Before the tournament
Kyle Edmund → replaced by 
Andrej Martin
Guillermo García López → replaced by 
Laslo Đere- Filip Krajinović → replaced by
Taro Daniel 
Andreas Seppi → replaced by 
Guido Pella
ATP doubles main draw entrants
Seeds
| Country | Player | Country | Player | Rank1 | Seed |
|---|---|---|---|---|---|
| GBR
|
Dominic Inglot |  CRO
|
Franko Škugor | 67 | 1 |
| NED
|
Robin Haase | NED
|
Matwé Middelkoop | 77 | 2 |
| CRO
|
Antonio Šančić |  BLR
|
Andrei Vasilevski | 129 | 3 |
| FRA
|
Jonathan Eysseric | FRA
|
Hugo Nys | 133 | 4 |
- Rankings are as of July 2, 2018
Other entrants
The following pairs received wildcards into the doubles main draw:
The following pair received entry as alternates:
Withdrawals
- Before the tournament
Champions
Men's singles
- Marco Cecchinato def. Guido Pella, 6–2, 7–6(7–4)
Men's doubles
Robin Haase / Matwé Middelkoop def. 
Roman Jebavý / Jiří Veselý, 6–4, 6–4
