| WTA Praha | 05/04 09:00 | 28 | [31] Shuai Zhang v Petra Kvitova [10] | 6-7,0-6 | |
| WTA Praha | 05/03 09:00 | 27 | [51] Katerina Siniakova v Petra Kvitova [10] | 3-6,3-6 | |
| WTA Praha | 05/02 09:00 | 26 | Natalia Vikhlyantseva v Petra Kvitova | 3-6,1-6 | |
| WTA Praha | 05/01 09:00 | 25 | [227] Tereza Smitkova v Petra Kvitova [10] | 1-6,3-6 | |
| WTA Stuttgart | 04/25 17:10 | 25 | [10] Petra Kvitova v Angelique Kerber [12] | 3-6,2-6 | |
| 2018 Fed Cup | 04/22 10:10 | 28 | [12] Angelique Kerber v Petra Kvitova [10] | 2-6,2-6 | |
| 2018 Fed Cup | 04/21 10:00 | 28 | [11] Julia Goerges v Petra Kvitova [10] | 3-6,2-6 | |
| WTA Charleston | 04/04 18:50 | 25 | [77] Kristyna Pliskova v Petra Kvitova [10] | 1-6,6-1,6-3 | |
| WTA Miami | 03/27 01:45 | 26 | [5] Jelena Ostapenko v Petra Kvitova [9] | 7-6,6-3 | |
| WTA Miami | 03/25 23:30 | 25 | [94] Sofia Kenin v Petra Kvitova [9] | 6-3,2-6,4-6 | |
| WTA Miami | 03/23 16:20 | 24 | [60] Aryna Sabalenka v Petra Kvitova [9] | 5-7,6-3,3-6 | |
| WTA Indian Wells | 03/11 18:00 | 25 | Petra Kvitova v Amanda Anisimova | 2-6,4-6 | |
| WTA Indian Wells | 03/09 19:00 | 24 | Petra Kvitova v Yulia Putintseva | 6-7,7-6,6-4 | |
| WTA Dubai | 02/20 06:00 | 25 | Anett Kontaveit v Petra Kvitova | Cancelled | |
| WTA Doha | 02/18 15:00 | 29 | Petra Kvitova v Garbine Muguruza | 3-6,6-3,6-4 | |
| WTA Doha | 02/17 16:00 | 28 | Caroline Wozniacki v Petra Kvitova | 6-3,6-7,5-7 | |
| WTA Doha | 02/16 19:00 | 27 | Petra Kvitova v Julia Goerges | Retired | |
| WTA Doha | 02/15 16:10 | 26 | Elina Svitolina v Petra Kvitova | 4-6,5-7 | |
| WTA Doha | 02/14 10:25 | 25 | Agnieszka Radwanska v Petra Kvitova | 7-6,3-6,4-6 | |
| WTA Doha | 02/13 11:50 | 24 | Cagla Buyukakcay v Petra Kvitova | 0-6,3-6 | |
| 2018 Fed Cup | 02/11 11:00 | 27 | Petra Kvitova v Belinda Bencic | 6-2,6-4 | |
| 2018 Fed Cup | 02/10 12:30 | 27 | Petra Kvitova v Viktorija Golubic | 6-2,1-6,6-3 | |
| WTA St. Petersburg | 02/04 13:30 | 29 | Kristina Mladenovic v Petra Kvitova | 1-6,2-6 | |
| WTA St. Petersburg | 02/03 11:00 | 28 | Julia Goerges v Petra Kvitova | 5-7,6-4,2-6 | |
| WTA St. Petersburg | 02/02 13:15 | 27 | Petra Kvitova v Jelena Ostapenko | 6-0,6-2 | |
| WTA St. Petersburg | 02/01 17:05 | 26 | Petra Kvitova v Irina-Camelia Begu | 6-3,1-6,6-1 | |
| WTA St. Petersburg | 01/31 12:45 | 25 | Elena Vesnina v Petra Kvitova | 2-6,0-6 | |
| Austraalia lahtised meistrivõistlused - naised | 01/16 05:40 | 23 | Andrea Petkovic v Petra Kvitova | 6-3,4-6,10-8 | |
| WTA Sydney | 01/10 06:05 | 26 | Camila Giorgi v Petra Kvitova | 7-6,6-2 | |
| WTA Sydney | 01/08 09:30 | 25 | Mirjana Lucic-Baroni v Petra Kvitova | Retired |
Petra Kvitová (sündinud 8. märtsil 1990) on Tšehhi naistennisist.
31. oktoobril 2011 jõudis ta üksikmängus WTA edetabelis teisele kohale. Ta on kogu karjääri jooksul võitnud üksikmängus 24 WTA ja 7 ITF-i turniiri.