| WTA Pekín | 10/02 09:15 | 25 | [86] Polona Hercog v Caroline Garcia [8] | 6-7,3-6 | |
| WTA Pekín | 09/30 08:25 | 24 | [50] Coco Vandeweghe v Polona Hercog [87] | 2-6,1-6 | |
| WTA Pekín | 09/29 06:00 | 46 | [57] Sorana Cirstea v Polona Hercog [87] | 6-3,1-6,3-6 | |
| WTA Pekín | 09/28 07:05 | 45 | [186] Lizette Cabrera v Polona Hercog [87] | 4-6,2-6 | |
| WTA Wuhan | 09/24 13:30 | 25 | [87] Polona Hercog v Shuai Zhang [46] | 2-6,5-7 | |
| WTA Wuhan | 09/22 03:00 | 46 | [46] Monica Puig v Polona Hercog [78] | 6-4,6-4 | |
| WTA Wuhan | 09/21 03:00 | 45 | [114] Christina McHale v Polona Hercog [78] | 6-7,1-6 | |
| WTA Seoul | 09/17 03:00 | 25 | [77] Polona Hercog v Tamara Zidansek [75] | 1-6,3-6 | |
| WTA Hiroshima | 09/11 05:35 | 25 | [77] Polona Hercog v Su-Wei Hsieh [40] | 6-4,1-6,3-6 | |
| US Open - Femenino | 08/27 19:10 | 23 | [77] Polona Hercog v Claire Liu [158] | 6-7,6-1,4-6 | |
| WTA New Haven - Clasificación | 08/17 14:00 | 44 | [403] Margarita Gasparyan v Polona Hercog [75] | 6-2,6-4 | |
| WTA Bucarest | 07/21 14:05 | 28 | [22] Anastasija Sevastova v Polona Hercog [90] | Retired | |
| WTA Bucarest | 07/20 20:05 | 27 | [123] Ons Jabeur v Polona Hercog [90] | 3-6,1-6 | |
| WTA Bucarest | 07/18 11:00 | 26 | [151] Irina Bara v Polona Hercog [90] | 5-7,2-6 | |
| WTA Bucarest | 07/16 17:30 | 25 | [182] Elena Gabriela Ruse v Polona Hercog [90] | 6-2,2-6,3-6 | |
| Wimbledon - Femenino | 07/03 12:55 | 23 | [47] Alison Van Uytvanck v Polona Hercog [64] | 6-2,6-2 | |
| WTA Mallorca | 06/21 10:00 | 26 | [64] Polona Hercog v Alison Riske [61] | 6-3,5-7,3-6 | |
| WTA Mallorca | 06/19 13:20 | 25 | [64] Polona Hercog v Viktoria Kuzmova [66] | 7-6,6-2 | |
| WTA Hertogenbosch | 06/12 15:15 | 25 | [64] Polona Hercog v Elise Mertens [15] | 2-6,4-6 | |
| Open de Francia - Femenino | 05/29 14:00 | 23 | [58] Polona Hercog v Anastasia Pavlyuchenkova [28] | 4-6,6-7 | |
| WTA Roma | 05/15 14:45 | 24 | [39] Svetlana Kuznetsova v Polona Hercog [62] | 6-2,6-4 | |
| WTA Roma - Clasificación | 05/13 09:00 | 46 | [45] Aleksandra Krunic v Polona Hercog [62] | 6-7,4-6 | |
| WTA Roma - Clasificación | 05/12 08:00 | 45 | [379] Federica Di Sarra v Polona Hercog [62] | 3-6,3-6 | |
| WTA Madrid - Clasificación | 05/04 12:50 | 45 | [62] Polona Hercog v Bernarda Pera [98] | 2-6,0-6 | |
| WTA Rabat | 05/02 14:10 | 26 | [212] Paula Badosa Gibert v Polona Hercog [62] | 6-7,6-1,6-2 | |
| WTA Rabat | 05/01 15:05 | 25 | [62] Polona Hercog v Dominika Cibulkova [33] | 2-6,7-5,6-4 | |
| WTA Estambul | 04/29 14:00 | 29 | [122] Pauline Parmentier v Polona Hercog [75] | 6-4,3-6,6-3 | |
| WTA Estambul | 04/28 11:00 | 28 | [48] Maria Sakkari v Polona Hercog [75] | 4-6,2-6 | |
| WTA Estambul | 04/27 11:25 | 27 | [75] Polona Hercog v Svetlana Kuznetsova [28] | 6-1,1-6,7-5 | |
| WTA Estambul | 04/26 12:00 | 26 | [75] Polona Hercog v Kateryna Bondarenko [78] | Retired |