| ITF W50 Calvi | 04/15 11:15 | 54 | Rezai, Aravane v Natalia Kowalczyk | 6-1,6-1 | |
| ITF W50 Calvi | 04/14 10:55 | 54 | Yoana Moneva v Natalia Kowalczyk | 6-4,2-6,5-7 | |
| ITF W35 Bujumbura | 04/09 09:50 | 25 | Natalia Kowalczyk v 호에트, 메렐 | 2-6,3-6 | |
| ITF W35 Bujumbura | 04/08 09:25 | 54 | Natalia Kowalczyk v Sharanya Shetty | 6-2,6-1 | |
| ITF W35 Bujumbura | 04/02 10:15 | 25 | Natalia Kowalczyk v 라스쿠토바, 크세니아 | 0-6,2-6 | |
| ITF W35 Bujumbura | 04/01 09:40 | 54 | Natalia Kowalczyk v Arora, Shefali | 6-4,6-0 | |
| ITF W15 Antalya | 03/03 07:00 | 62 | Yoana Radulova v Natalia Kowalczyk | 6-4,7-5 | |
| ITF W15 Antalya | 02/25 07:00 | 62 | Stoppel, Jasmina v Natalia Kowalczyk | 6-2,7-6 | |
| ITF W25 Nakhon Si Thammarat Qual | 09/03 01:50 | 54 | 아이카와, 마유카 v Natalia Kowalczyk | 6-2,6-0 | |
| ITF W25 Astana | 07/31 10:35 | 54 | Natalia Kowalczyk v Ingkar Dyussebay | 4-6,1-6 | |
| ITF W25 Punta Cana | 07/11 12:50 | 62 | 레아스코 곤잘레즈, 멜 엘리자베스 v Natalia Kowalczyk | 6-1,6-0 | |
| ITF W25 Punta Cana | 07/09 15:30 | 62 | Andanin Vilas v Natalia Kowalczyk | 3-6,1-6 | |
| ITF W25 Punta Cana | 07/03 16:00 | 62 | 반젤로바, 아니 v Natalia Kowalczyk | 6-2,6-0 | |
| ITF W25 Punta Cana | 07/02 15:30 | 62 | 라지모한, 니디트라 v Natalia Kowalczyk | 5-7,6-7 | |
| ITF W40 Otocec | 05/21 11:10 | 54 | Natalia Kowalczyk v Ana Grubor | 4-6,1-6 | |
| ITF W25 Kursumlijska Banja | 05/15 07:00 | 62 | 로브리치, 피아 v Natalia Kowalczyk | 6-2,6-0 | |
| ITF W25 Kursumlijska Banja | 05/14 10:30 | 62 | Mia Sarcev v Natalia Kowalczyk | 4-6,2-6 | |
| ITF W25 Bujumbura | 04/13 09:40 | 26 | Natalia Kowalczyk v 김브레레, 자스미진 | 2-6,3-6 | |
| ITF W25 Bujumbura | 04/12 07:00 | 25 | 베키리, 치라즈 v Natalia Kowalczyk | 4-6,6-0,6-7 | |
| ITF W25 Bujumbura | 04/10 08:00 | 54 | 프라트, 네사 v Natalia Kowalczyk | 3-6,0-6 | |
| ITF W25 Bujumbura | 04/04 08:05 | 25 | Natalia Kowalczyk v Wozuko Mdlulwa | 6-7,6-4,4-6 | |
| ITF W25 Bujumbura | 04/03 08:00 | 54 | 유, 민 v Natalia Kowalczyk | 6-2,2-6,7-10 | |
| ITF W15 Heraklion | 03/19 08:00 | 62 | Natalia Kowalczyk v Emma Slavikova | 3-6,4-6 | |
| ITF W25 Manacor | 02/12 12:30 | 62 | Vanja Gudelj v Natalia Kowalczyk | 7-5,6-4 | |
| ITF W15 Nairobi | 11/22 09:05 | 25 | Natalia Kowalczyk v 율다세바, 세빌 | 1-6,2-6 | |
| ITF W15 Nairobi | 11/15 13:20 | 25 | Adegoke, Sarah v Natalia Kowalczyk | 6-1,6-2 | |
| ITF W25 Kiryat Motzkin | 11/06 11:00 | 54 | Natalia Kowalczyk v 리에버만, 사치프 | 5-7,6-2,9-11 | |
| ITF W25 Jerusalem | 10/30 09:00 | 54 | Pavlova, Kira v Natalia Kowalczyk | 6-2,6-2 | |
| ITF W25 Bydgoszcz | 08/14 09:00 | 62 | Natalia Kowalczyk v Frankowka, Zuzanna | 1-6,0-6 | |
| ITF W25 Radom | 08/07 08:00 | 44 | Natalia Kowalczyk v Marusinova, Martina | 2-6,3-6 |