| Singles | |
|---|---|
| 2018 J&T Banka Prague Open | |
| Champion |  Petra Kvitová |
| Runner-up |  Mihaela Buzărnescu |
| Score | 4–6, 6–2, 6–3 |
| Draw | 32 |
| Seeds | 8 |
Mona Barthel was the defending champion, but lost in the first round to Antonia Lottner.
Petra Kvitová won the title, defeating Mihaela Buzărnescu in the final, 4–6, 6–2, 6–3.
Karolína Plíšková (withdrew) Petra Kvitová (champion)
Daria Kasatkina (first round)
Daria Gavrilova (first round, retired) Barbora Strýcová (first round)
Zhang Shuai (semifinals) Mihaela Buzărnescu (final) Kateřina Siniaková (quarterfinals)
Aliaksandra Sasnovich (first round)| Semifinals | Final | ||||||||||||
| 7 | Mihaela Buzărnescu | 4 | 6 | 7 | |||||||||
 Camila Giorgi | 6 | 3 | 5 | ||||||||||
| 7 | Mihaela Buzărnescu | 6 | 2 | 3 | |||||||||
| 2 | Petra Kvitová | 4 | 6 | 6 | |||||||||
| 6 | Zhang Shuai | 66 | 0 | ||||||||||
| 2 | Petra Kvitová | 78 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 9 | A Sasnovich | 65 | 3 | ||||||||||||||||||||||||
| Kr Plíšková | 77 | 6 | Kr Plíšková | 6 | 77 | ||||||||||||||||||||||
 V Kužmová | 64 | 1 | Q Wang | 2 | 63 | ||||||||||||||||||||||
| Q Wang | 77 | 6 | Kr Plíšková | 2 | 3 | ||||||||||||||||||||||
 M Barthel | 0 | 5 | 7 | M Buzărnescu | 6 | 6 | |||||||||||||||||||||
| Q | A Lottner | 6 | 7 | Q | A Lottner | 0 | 67 | ||||||||||||||||||||
 B Haddad Maia | 1 | 5 | 7 | M Buzărnescu | 6 | 79 | |||||||||||||||||||||
| 7 | M Buzărnescu | 6 | 7 | 7 | M Buzărnescu | 4 | 6 | 7 | |||||||||||||||||||
| 4 | D Gavrilova | 3 | 6 | 0r | C Giorgi | 6 | 3 | 5 | |||||||||||||||||||
| S Stosur | 6 | 4 | 0 | S Stosur | 6 | 6 | |||||||||||||||||||||
| D Allertová | 6 | 6 | D Allertová | 4 | 4 | ||||||||||||||||||||||
| Q |  P Schnyder | 4 | 4 | S Stosur | 2 | 3 | |||||||||||||||||||||
| LL | T Korpatsch | 6 | 7 | C Giorgi | 6 | 6 | |||||||||||||||||||||
 O Dodin | 2 | 5 | LL | T Korpatsch | 4 | 2 | |||||||||||||||||||||
| C Giorgi | 6 | 2 | 6 | C Giorgi | 6 | 6 | |||||||||||||||||||||
| 5 | B Strýcová | 0 | 6 | 2 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | S Zhang | 6 | 7 | ||||||||||||||||||||||||
| Q | S Vögele | 4 | 5 | 6 | S Zhang | 6 | 6 | ||||||||||||||||||||
| Q | E-G Ruse | 2 | 6 | 7 | Q | E-G Ruse | 4 | 4 | |||||||||||||||||||
 B Pera | 6 | 1 | 5 | 6 | S Zhang | 6 | 6 | ||||||||||||||||||||
 H Watson | 1 | 3 | LL | J Paolini | 4 | 3 | |||||||||||||||||||||
| WC | AK Schmiedlová | 6 | 6 | WC | AK Schmiedlová | 4 | 1 | ||||||||||||||||||||
| LL | J Paolini | 78 | 6 | LL | J Paolini | 6 | 6 | ||||||||||||||||||||
| 3/WC | D Kasatkina | 66 | 3 | 6 | S Zhang | 66 | 0 | ||||||||||||||||||||
| 8 | K Siniaková | 6 | 77 | 2 | P Kvitová | 78 | 6 | ||||||||||||||||||||
| A Petkovic | 2 | 64 | 8 | K Siniaková | 6 | 3 | 6 | ||||||||||||||||||||
| E Alexandrova | 77 | 6 | E Alexandrova | 4 | 6 | 3 | |||||||||||||||||||||
 R Hogenkamp | 65 | 1 | 8 | K Siniaková | 3 | 3 | |||||||||||||||||||||
| N Vikhlyantseva | 6 | 6 | 2 | P Kvitová | 6 | 6 | |||||||||||||||||||||
| C Witthöft | 4 | 4 | N Vikhlyantseva | 3 | 1 | ||||||||||||||||||||||
| WC | T Smitková | 1 | 3 | 2 | P Kvitová | 6 | 6 | ||||||||||||||||||||
| 2 | P Kvitová | 6 | 6 | ||||||||||||||||||||||||
Stefanie Vögele (qualified)
Miyu Kato (first round) Tamara Korpatsch (qualifying competition, lucky loser) Jasmine Paolini (qualifying competition, lucky loser) Anna Kalinskaya (first round, retired) Patty Schnyder (qualified) Antonia Lottner (qualified)
Marta Kostyuk (first round)| First round | Second round | Qualifying competition | ||||||||||||||||||
| 1 | Stefanie Vögele | 6 | 6 | |||||||||||||||||
| Valentyna Ivakhnenko | 0 | 2 | ||||||||||||||||||
| 1 | Stefanie Vögele | 6 | 6 | |||||||||||||||||
| Misaki Doi | 4 | 2 | ||||||||||||||||||
 Diāna Marcinkēviča | 4 | 7 | 1 | |||||||||||||||||
| Misaki Doi | 6 | 5 | 6 | |||||||||||||||||
| 1 | Stefanie Vögele | 6 | 6 | |||||||||||||||||
| Anastasia Zarycká | 4 | 2 | ||||||||||||||||||
| PR |  Réka Luca Jani | 2 | 3 | |||||||||||||||||
| Priscilla Hon | 6 | 6 | ||||||||||||||||||
| Priscilla Hon | 4 | 4 | ||||||||||||||||||
| Anastasia Zarycká | 6 | 6 | ||||||||||||||||||
| Anastasia Zarycká | 3 | 6 | 1 | |||||||||||||||||
| 5 | Anna Kalinskaya | 6 | 2 | 0r | ||||||||||||||||
| First round | Second round | Qualifying competition | ||||||||||||||||||
| 2 | Miyu Kato | 4 | 2 | |||||||||||||||||
| Tereza Martincová | 6 | 6 | ||||||||||||||||||
| Tereza Martincová | 7 | 6 | ||||||||||||||||||
| Deborah Chiesa | 5 | 3 | ||||||||||||||||||
| Deborah Chiesa | 5 | 6 | 6 | |||||||||||||||||
| WC | Miriam Kolodziejová | 7 | 2 | 2 | ||||||||||||||||
| Tereza Martincová | 2 | 62 | ||||||||||||||||||
| Elena-Gabriela Ruse | 6 | 77 | ||||||||||||||||||
| WC | Karolína Beránková | 5 | 1 | |||||||||||||||||
 Viktoriya Tomova | 7 | 6 | ||||||||||||||||||
| Viktoriya Tomova | 2 | 66 | ||||||||||||||||||
| Elena-Gabriela Ruse | 6 | 78 | ||||||||||||||||||
| Elena-Gabriela Ruse | 2 | 7 | 6 | |||||||||||||||||
| 8 | Marta Kostyuk | 6 | 5 | 3 | ||||||||||||||||
| First round | Second round | Qualifying competition | ||||||||||||||||||
| 3 | Tamara Korpatsch | 6 | 2 | 6 | ||||||||||||||||
| Michaela Hončová | 3 | 6 | 3 | |||||||||||||||||
| 3 | Tamara Korpatsch | 6 | 3 | 6 | ||||||||||||||||
| PR | Rebecca Šramková | 4 | 6 | 4 | ||||||||||||||||
| Tessah Andrianjafitrimo | 3 | 2 | ||||||||||||||||||
| PR | Rebecca Šramková | 6 | 6 | |||||||||||||||||
| 3 | Tamara Korpatsch | 1 | 5 | |||||||||||||||||
| 6 | Patty Schnyder | 6 | 7 | |||||||||||||||||
| WC | Aneta Kladivová | 2 | 1 | |||||||||||||||||
| Marina Melnikova | 6 | 6 | ||||||||||||||||||
| Marina Melnikova | 3 | 5 | ||||||||||||||||||
| 6 | Patty Schnyder | 6 | 7 | |||||||||||||||||
| Marie Bouzková | 2 | 1 | ||||||||||||||||||
| 6 | Patty Schnyder | 6 | 6 | |||||||||||||||||
| First round | Second round | Qualifying competition | ||||||||||||||||||
| 4 | Jasmine Paolini | 6 | 6 | |||||||||||||||||
| Alt | Shuko Aoyama | 1 | 3 | |||||||||||||||||
| 4 | Jasmine Paolini | 6 | 6 | |||||||||||||||||
 Ulrikke Eikeri | 3 | 0 | ||||||||||||||||||
| Chantal Škamlová | 1 | 3 | ||||||||||||||||||
| Ulrikke Eikeri | 6 | 6 | ||||||||||||||||||
| 4 | Jasmine Paolini | 3 | 5 | |||||||||||||||||
| 7 | Antonia Lottner | 6 | 7 | |||||||||||||||||
| Jesika Malečková | 3 | 4 | ||||||||||||||||||
| WC | Barbora Štefková | 6 | 6 | |||||||||||||||||
| WC | Barbora Štefková | 2 | 0 | |||||||||||||||||
| 7 | Antonia Lottner | 6 | 6 | |||||||||||||||||
| Petra Krejsová | 4 | 3 | ||||||||||||||||||
| 7 | Antonia Lottner | 6 | 6 | |||||||||||||||||
Petra Kvitová was the defending champion, but she was defeated in the final by Simona Halep 6–2, 6–2.
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