Stadium: Court 8 Round: 45 Ground: Hardcourt outdoor
| ITF Women Norman | 2018/11/13 20:25 | Hanna Chang v Lorraine M. Guillermo | 4-6,4-6 |
| ITF Women Macon Qual | 2017/10/23 21:20 | Hanna Chang v Lorraine M. Guillermo | 1-6,4-6 |
| ITF Women Norman | 2018/11/16 18:55 | Lorraine M. Guillermo v Yuriko Lily Miyazaki | 5-7,7-5,1-6 |
| ITF Women Norman | 2018/11/15 18:20 | Nadia Podoroska v Lorraine M. Guillermo | 1-6,6-3,5-7 |
| ITF Women Norman | 2018/11/13 20:25 | Hanna Chang v Lorraine M. Guillermo | 4-6,4-6 |
| ITF Women Lawrence | 2018/11/03 16:00 | Lorraine M. Guillermo v Natasha Subhash | 5-7,3-6 |
| ITF Women Toronto | 2018/10/28 14:00 | Kennedy Shaffer v Lorraine M. Guillermo | 6-4,6-3 |
| ITF Women Toronto | 2018/10/27 16:35 | Maria Tanasescu v Lorraine M. Guillermo | 1-6,1-6 |
| ITF Women Saguenay | 2018/10/21 16:45 | Pamela Montez v Lorraine M. Guillermo | 6-1,6-3 |
| ITF Women Saguenay | 2018/10/20 16:10 | Alice Garcia v Lorraine M. Guillermo | 4-6,3-6 |
| WTA Newport Beach | 2019/01/23 19:55 | Hanna Chang v Taylor Townsend | 3-6,4-6 |
| WTA Newport Beach | 2019/01/21 22:25 | Lena Papadakis v Hanna Chang | 6-2,5-7,5-7 |
| ITF W25 Daytona Beach | 2019/01/15 14:30 | Chiara Scholl v Hanna Chang | 6-4,7-5 |
| ITF W25 Daytona Beach | 2019/01/14 16:00 | Anastasiya Antal v Hanna Chang | 3-6,1-6 |
| ITF Women Norman | 2018/11/13 20:25 | Hanna Chang v Lorraine M. Guillermo | 4-6,4-6 |
| ITF Women Las Vegas | 2018/11/08 20:00 | Hanna Chang v Fanny Stollar | 3-6,4-6 |
| ITF Women Las Vegas | 2018/11/07 18:00 | Asia Muhammad v Hanna Chang | 6-4,3-6,3-6 |
| ITF Women Las Vegas | 2018/11/06 18:00 | Julia Elbaba v Hanna Chang | 1-6,3-6 |