| WTA Toronto Qual | 08/06 15:45 | 45 | [115] Mariana Duque Marino v Misaki Doi [81] | 3-6,6-3,6-4 | |
| WTA Toronto Qual | 08/05 18:55 | 44 | [50] Mona Barthel v Mariana Duque Marino [115] | 6-1,4-6,4-6 | |
| WTA Washington | 08/03 17:50 | 26 | [2] Simona Halep v Mariana Duque Marino [115] | 3-6,6-4,6-2 | |
| WTA Washington | 07/31 23:30 | 25 | [115] Mariana Duque Marino v Shelby Rogers [60] | 6-4,6-1 | |
| ITF Women Budapest | 07/13 10:20 | 27 | [125] Danka Kovinic v Mariana Duque Marino [121] | 6-3,2-6,6-2 | |
| ITF Women Budapest | 07/12 08:00 | 26 | [139] Tereza Martincova v Mariana Duque Marino [121] | 6-0,1-6,1-6 | |
| ITF Women Budapest | 07/11 08:45 | 25 | Nina Potocnik v Mariana Duque Marino | 2-6,0-6 | |
| ITF Women Rome | 07/09 09:30 | 29 | [160] Kateryna Kozlova v Mariana Duque Marino [121] | 7-6,6-4 | |
| ITF Women Rome | 07/08 13:00 | 28 | [162] Viktoriya Tomova v Mariana Duque Marino [121] | 3-6,2-6 | |
| ITF Women Rome | 07/07 13:00 | 27 | [214] Georgia Brescia v Mariana Duque Marino [121] | 4-6,4-6 | |
| ITF Women Rome | 07/06 12:05 | 26 | [366] Anastasia Grymalska v Mariana Duque Marino [121] | 3-6,0-6 | |
| ITF Women Rome | 07/04 15:15 | 25 | [178] Anastasiya Komardina v Mariana Duque Marino [121] | 1-6,2-6 | |
| Wimbledon Women Qual | 06/30 10:00 | 46 | [119] Mariana Duque Marino v Irina Falconi [246] | 1-6,4-6 | |
| Wimbledon Women Qual | 06/29 10:00 | 45 | [119] Mariana Duque Marino v Kathinka Von Deichmann [181] | 3-6,6-0,6-2 | |
| Wimbledon Women Qual | 06/27 10:00 | 44 | [119] Mariana Duque Marino v Montserrat Gonzalez [201] | 7-6,6-7,6-3 | |
| WTA Mallorca Qual | 06/18 11:55 | 45 | [190] Veronika Kudermetova v Mariana D. Marino [110] | 4-6,6-2,6-3 | |
| Prantsusmaa lahtised - naised | 06/04 09:00 | 25 | [97] Veronica Cepede Royg v Mariana Duque Marino [115] | 3-6,7-6,6-3 | |
| Prantsusmaa lahtised - naised | 06/01 15:00 | 24 | [115] Mariana Duque Marino v Magdalena Rybarikova [192] | 1-6,6-3,8-6 | |
| Prantsusmaa lahtised - naised | 05/29 14:50 | 23 | [115] Mariana Duque Marino v Irina-Camelia Begu [46] | 7-6,6-4 | |
| WTA Rome Qual | 05/14 09:00 | 46 | Anett Kontaveit v Mariana D. Marino | 3-6,6-2,7-5 | |
| WTA Rome Qual | 05/13 11:30 | 45 | Mariana D. Marino v Natalia Vikhlyantseva | 7-6,7-5 | |
| WTA Madrid | 05/09 10:00 | 25 | Samantha Stosur v Mariana D. Marino | 6-3,7-5 | |
| WTA Madrid | 05/07 13:10 | 24 | Julia Goerges v Mariana D. Marino | 3-6,4-6 | |
| WTA Madrid Qual | 05/06 09:00 | 46 | [65] Anett Kontaveit v Mariana Duque Marino [98] | 3-6,3-6 | |
| WTA Madrid Qual | 05/05 09:30 | 45 | [98] Mariana Duque Marino v Nao Hibino [81] | 6-4,2-6,6-3 | |
| WTA Prague Qual | 05/01 08:00 | 54 | [77] Natalia Vikhlyantseva v Mariana Duque Marino [99] | 6-2,6-1 | |
| WTA Prague Qual | 04/30 10:00 | 46 | Anastasia Zarycka v Mariana Duque Marino | 1-6,2-6 | |
| WTA Prague Qual | 04/29 11:35 | 45 | [163] Viktoria Kuzmova v Mariana Duque Marino [99] | 7-5,4-6,4-6 | |
| WTA Stuttgart Qual | 04/22 08:00 | 45 | [175] Antonia Lottner v Mariana Duque Marino [101] | 7-5,1-6,6-4 | |
| WTA Bogota | 04/10 17:50 | 25 | [132] Aleksandra Krunic v Mariana Duque Marino [100] | 6-2,6-4 |