Stadion: Court 8 Round: 26 Ground: Hardcourt outdoor
| ITF Damen - W15 - Cancun | 2019/12/05 21:00 | Karla Portalatin v Natsumi Kawaguchi | 5-7,3-6 |
| ITF Damen - W15 - Cancun | 2019/12/11 17:00 | Natsumi Kawaguchi v Eva Raszkiewicz | 7-5,6-4 |
| ITF Damen - W15 - Cancun | 2019/12/07 14:00 | Marcela Zacarias v Natsumi Kawaguchi | 6-2,7-5 |
| ITF Damen - W15 - Cancun | 2019/12/06 16:35 | Paige Cline v Natsumi Kawaguchi | 0-6,6-1,3-6 |
| ITF Damen - W15 - Cancun | 2019/12/05 21:00 | Karla Portalatin v Natsumi Kawaguchi | 5-7,3-6 |
| ITF Damen - W15 - Cancun | 2019/12/04 17:30 | Patience Monroe v Natsumi Kawaguchi | 0-6,1-6 |
| ITF Damen - W25 - Montpellier | 2019/06/17 08:00 | Amandine Cazeaux v Natsumi Kawaguchi | 6-3,6-2 |
| ITF Damen - W15 - Kaltenkirchen | 2019/06/14 13:10 | Clara Tauson v Natsumi Kawaguchi | 6-7,6-4,6-2 |
| ITF Damen - W15 - Kaltenkirchen | 2019/06/13 09:30 | Natsumi Kawaguchi v Oana Georgeta Simion | 6-4,6-4 |
| ITF Damen - W15 - Cancun | 2019/12/11 15:35 | Karla Portalatin v Kimberly Alinafe Mpukusa | 6-0,6-0 |
| ITF Damen - W15 - Cancun | 2019/12/05 21:00 | Karla Portalatin v Natsumi Kawaguchi | 5-7,3-6 |
| ITF Damen - W15 - Cancun | 2019/12/04 16:40 | Karla Portalatin v Misha Berry | 7-6,6-3 |
| ITF Damen - W15 - Guatemala | 2019/11/06 16:00 | Karla Portalatin v Melissa Morales | 5-7,3-6 |
| ITF Damen - W15 - Metepec | 2019/10/23 16:00 | Sabastiani Leon v Karla Portalatin | 6-2,6-2 |
| ITF Damen - W15 - Metepec | 2019/10/17 20:55 | Karla Portalatin v Sarah Lee | 2-6,4-6 |
| ITF Damen - W15 - Metepec | 2019/10/15 15:00 | Julia Klimovicz v Karla Portalatin | 4-6,2-6 |
| Fed Cup 2017 | 2017/07/21 15:00 | Daniela Schippers v Karla Portalatin | 6-1,6-2 |