Stadium: Court 8 Round: 26 Ground: Hardcourt outdoor
| ITF W15 Cancun | 2019/12/05 21:00 | Portalatin, Karla v Natsumi Kawaguchi | 5-7,3-6 |
| ITF W15 Cancun | 2019/12/11 17:00 | Natsumi Kawaguchi v Raszkiewics, Eva | 7-5,6-4 |
| ITF W15 Cancun | 2019/12/07 14:00 | Marcela Zacarias v Natsumi Kawaguchi | 6-2,7-5 |
| ITF W15 Cancun | 2019/12/06 16:35 | Cline, Paige v Natsumi Kawaguchi | 0-6,6-1,3-6 |
| ITF W15 Cancun | 2019/12/05 21:00 | Portalatin, Karla v Natsumi Kawaguchi | 5-7,3-6 |
| ITF W15 Cancun | 2019/12/04 17:30 | Monroe, Patience v Natsumi Kawaguchi | 0-6,1-6 |
| Montpellier, Singles W-ITF-FRA-17A | 2019/06/17 08:00 | Cazeaux, Amandine v Natsumi Kawaguchi | 6-3,6-2 |
| Kaltenkirchen, Singles Qualifying W-ITF-GER-07A | 2019/06/14 13:10 | Clara Tauson v Natsumi Kawaguchi | 6-7,6-4,6-2 |
| Kaltenkirchen, Singles Qualifying W-ITF-GER-07A | 2019/06/13 09:30 | Natsumi Kawaguchi v Oana Georgeta Simion | 6-4,6-4 |
| ITF W15 Cancun | 2019/12/11 15:35 | Portalatin, Karla v Mpukusa, Kimberly | 6-0,6-0 |
| ITF W15 Cancun | 2019/12/05 21:00 | Portalatin, Karla v Natsumi Kawaguchi | 5-7,3-6 |
| ITF W15 Cancun | 2019/12/04 16:40 | Portalatin, Karla v Berry, Misha Aliza Berry | 7-6,6-3 |
| ITF W15 Guatemala | 2019/11/06 16:00 | Portalatin, Karla v Morales, Melissa | 5-7,3-6 |
| Metepec, Singles W-ITF-MEX-24A | 2019/10/23 16:00 | Sabastiani Leon v Portalatin, Karla | 6-2,6-2 |
| Metepec, Singles W-ITF-MEX-24A | 2019/10/17 20:55 | Portalatin, Karla v Lee, Sarah | 2-6,4-6 |
| Metepec, Singles W-ITF-MEX-24A | 2019/10/15 15:00 | Klimovicz, Julia v Portalatin, Karla | 4-6,2-6 |
| Fed Cup, Matchs en Doubles | 2017/07/21 15:00 | Schippers, Daniela v Portalatin, Karla | 6-1,6-2 |