# 2018 Bol Open – Singles

Aleksandra Krunić was the reigning champion, but chose not to defend her title.
Tamara Zidanšek won the title, defeating Magda Linette in the final 6–1, 6–3.

## Seeds

* Kateryna Kozlova (first round)
* Magda Linette (final)
* Ajla Tomljanović (first round)
* Sara Errani (semifinals, withdrew)
* Anna Karolína Schmiedlová (quarterfinals)
* Wang Yafan (first round)
* Viktorija Golubic (quarterfinals)
* Mariana Duque Mariño (quarterfinals)

## 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 | Final | Final | Final | Final |
| WC | Tena Lukas | 4 | 3 | | | | |
| | Tamara Zidanšek | 6 | 6 | | | | |
| | Tamara Zidanšek | 6 | 6 | | Tamara Zidanšek | 6 | 6 |
| | | | | 2 | Magda Linette | 1 | 3 |
| 4 | Sara Errani | | | 2 | Magda Linette | 1 | 3 |
| 2 | Magda Linette | w/o | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | K Kozlova | 3 | 1 | | | | | | | | | | | | | | | |
| | C Zhao | 6 | 6 | | | C Zhao | 0 | 6 | 5 | | | | | | | | | |
| WC | T Lukas | 6 | 6 | | WC | T Lukas | 6 | 2 | 7 | | | | | | | | | |
| | E Cabeza Candela | 1 | 0 | | | | | | | WC | T Lukas | 6 | 4 | 6 | | | | |
| | S Zheng | 5 | 3 | | | | | | | 8 | M Duque Mariño | 4 | 6 | 1 | | | | |
| | M Minella | 7 | 6 | | | M Minella | 3 | 1 | | | | | | | | | | |
| | T Martincová | 6 | 3 | 2 | 8 | M Duque Mariño | 6 | 6 | | | | | | | | | | |
| 8 | M Duque Mariño | 2 | 6 | 6 | | | | | | | | | | | WC | T Lukas | 4 | 3 |
| 3 | A Tomljanović | 3 | 1 | | | | | | | | | | | | | T Zidanšek | 6 | 6 |
| | T Zidanšek | 6 | 6 | | | T Zidanšek | 6$^2$ | 6 | 6 | | | | | | | | | |
| | Y Bonaventure | 2 | 0 | | | A Cadanțu | 7$^7$ | 3 | 3 | | | | | | | | | |
| | A Cadanțu | 6 | 6 | | | | | | | | T Zidanšek | 6 | 6 | | | | | |
| | J Paolini | 5 | 3 | | | | | | | 5 | AK Schmiedlová | 4 | 4 | | | | | |
| | S Soler Espinosa | 7 | 6 | | | S Soler Espinosa | 2 | 1 | | | | | | | | | | |
| | M Kostyuk | 5 | 2 | | 5 | AK Schmiedlová | 6 | 6 | | | | | | | | | | |
| 5 | AK Schmiedlová | 7 | 6 | | | | | | | | | | | | | | | |

### 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 | Semifinals | Semifinals | Semifinals |
| 6 | Y Wang | 6 | 4 | 6$^5$ | | | | | | | | | | | | |
| | S Sorribes Tormo | 3 | 6 | 7$^7$ | | S Sorribes Tormo | 6 | 6 | | | | | | | | |
| | S Zhuk | 6 | 6 | | | S Zhuk | 4 | 0 | | | | | | | | |
| | K Kučová | 2 | 3 | | | | | | | | S Sorribes Tormo | 1 | 4 | | | |
| | M Barthel | 6 | 2 | 5 | | | | | | 4 | S Errani | 6 | 6 | | | |
| | V Tomova | 4 | 6 | 7 | | V Tomova | 1 | 6 | 2 | | | | | | | |
| | N Bains | 3 | 0 | | 4 | S Errani | 6 | 4 | 6 | | | | | | | |
| 4 | S Errani | 6 | 6 | | | | | | | | | | | 4 | S Errani | |
| 7 | V Golubic | 6 | 7$^7$ | | | | | | | | | | | 2 | M Linette | w/o |
| WC | B Štefková | 4 | 6$^0$ | | 7 | V Golubic | 6 | 0 | 6 | | | | | | | |
| | M Hončová | 4 | 6 | 6 | | M Hončová | 3 | 6 | 3 | | | | | | | |
| | E-G Ruse | 6 | 4 | 3 | | | | | | 7 | V Golubic | 5 | 4 | | | |
| | D Kovinić | 6 | 6 | | | | | | | 2 | M Linette | 7 | 6 | | | |
| WC | L Bošković | 3 | 2 | | | D Kovinić | 4 | 6 | 1 | | | | | | | |
| | A Kalinina | 4 | 6$^0$ | | 2 | M Linette | 6 | 2 | 6 | | | | | | | |
| 2 | M Linette | 6 | 7$^7$ | | | | | | | | | | | | | |