| WTA Madrid | 05/04 12:35 | 46 | [66] Andrea Petkovic v Polona Hercog [71] | 6-4,6-7,1-6 | |
| WTA Madrid | 05/03 15:05 | 45 | [80] Viktorija Golubic v Polona Hercog [71] | 4-6,1-6 | |
| WTA Rabat | 05/01 13:45 | 26 | [71] Polona Hercog v Rebecca Peterson [62] | 5-7,6-3,1-6 | |
| WTA Rabat | 04/30 10:00 | 25 | [178] Irina Bara v Polona Hercog [71] | 6-7,4-6 | |
| WTA Rabat | 04/30 10:00 | 25 | Petra Martic v Polona Hercog | Cancelled | |
| WTA Lugano | 04/14 09:30 | 29 | [115] Iga Swiatek v Polona Hercog [89] | 3-6,6-3,3-6 | |
| WTA Lugano | 04/13 09:00 | 28 | [108] Fiona Ferro v Polona Hercog [89] | 5-7,4-6 | |
| WTA Lugano | 04/12 09:00 | 27 | [83] Veronika Kudermetova v Polona Hercog [89] | 4-6,1-6 | |
| WTA Lugano | 04/10 11:50 | 26 | [103] Sorana Cirstea v Polona Hercog [89] | 6-3,6-7,4-6 | |
| WTA Lugano | 04/09 10:30 | 25 | [89] Polona Hercog v Carla Suarez Navarro [27] | 3-6,6-3,6-4 | |
| WTA Miami | 03/24 18:10 | 25 | [93] Polona Hercog v Simona Halep [3] | 7-5,6-7,2-6 | |
| WTA Miami | 03/23 00:10 | 24 | [93] Polona Hercog v Misaki Doi [112] | 7-6,6-4 | |
| WTA Miami | 03/20 14:00 | 45 | [93] Polona Hercog v Laura Siegemund [108] | 6-3,2-6,2-6 | |
| WTA Miami | 03/18 22:40 | 44 | [93] Polona Hercog v Fanny Stollar [124] | 6-2,6-2 | |
| WTA Dubai | 02/18 15:00 | 24 | [88] Polona Hercog v Stefanie Voegele [83] | 3-6,2-6 | |
| WTA Dubai | 02/16 08:45 | 46 | [88] Polona Hercog v Lucie Hradecka [456] | 6-2,5-7,0-6 | |
| WTA Dubai | 02/15 07:45 | 45 | [88] Polona Hercog v Julia Elbaba [304] | 5-7,7-6,6-3 | |
| WTA Doha | 02/12 11:00 | 25 | [52] Alison Riske v Polona Hercog [88] | 6-4,6-3 | |
| WTA Doha | 02/11 12:30 | 54 | [41] Ajla Tomljanovic v Polona Hercog [88] | 6-3,6-4 | |
| WTA Doha | 02/10 12:30 | 46 | [139] Sabina Sharipova v Polona Hercog [88] | 5-7,5-7 | |
| WTA Doha | 02/09 08:00 | 45 | [304] Julia Elbaba v Polona Hercog [88] | 1-6,3-6 | |
| ITF W60 Andrezieux-Boutheon | 01/26 15:50 | 28 | [92] Polona Hercog v Rebecca Sramkova [242] | Retired | |
| ITF W60 Andrezieux-Boutheon | 01/25 18:00 | 27 | [92] Polona Hercog v Myrtille Georges [239] | 6-2,4-6,6-4 | |
| ITF W60 Andrezieux-Boutheon | 01/24 14:00 | 26 | [92] Polona Hercog v Maria Sanchez [343] | 6-3,6-3 | |
| ITF W60 Andrezieux-Boutheon | 01/23 13:00 | 25 | [92] Polona Hercog v Elena Gabriela Ruse [252] | 6-4,6-4 | |
| Open de Australia - Femenino | 01/14 04:10 | 23 | [92] Polona Hercog v Angelique Kerber [2] | 2-6,2-6 | |
| WTA Hobart | 01/05 00:00 | 45 | [85] Polona Hercog v Olivia Rogowska [247] | 7-6,0-6,3-6 | |
| WTA Auckland | 01/01 03:20 | 25 | [28] Su-Wei Hsieh v Polona Hercog [85] | 6-2,6-3 | |
| WTA Tianjín | 10/10 03:30 | 26 | [6] Karolina Pliskova v Polona Hercog [77] | 6-1,6-2 | |
| WTA Tianjín | 10/08 05:45 | 25 | [73] Lara Arruabarrena v Polona Hercog [86] | 6-7,2-6 |