| UTR Pro Tennis Series California Women | 2020/07/29 17:15 | Hanna Chang v Guillermo, Lorraine M | 3-6,6-2,10-6 |
| UTR Pro Tennis Series California Women | 2020/07/20 18:30 | Guillermo, Lorraine M v Hanna Chang | 1-6,2-6 |
| UTR Pro Tennis Series California Women | 2020/07/13 19:45 | Guillermo, Lorraine M v Hanna Chang | 2-6,1-6 |
| US Pro Tennis Series West Coast Women | 2020/06/19 17:20 | Hanna Chang v Guillermo, Lorraine M | 6-4,7-5 |
| US Pro Tennis Series West Coast Women | 2020/06/05 18:05 | Hanna Chang v Guillermo, Lorraine M | 6-0,6-4 |
| Surprise, Singles W-ITF-USA-04A | 2019/02/11 16:00 | Guillermo, Lorraine M v Hanna Chang | 6-3,2-6,4-10 |
| ITF Women Norman | 2018/11/13 20:25 | Hanna Chang v Guillermo, Lorraine M | 4-6,4-6 |
| ITF Women Macon Qual | 2017/10/23 21:20 | Hanna Chang v Guillermo, Lorraine M | 1-6,4-6 |
| UTR Pro Tennis Series California Women | 2020/08/17 16:00 | Sophie Chang v Hanna Chang | 6-7,6-3,10-4 |
| UTR Pro Tennis Series California Women | 2020/08/06 18:30 | Hanna Chang v Marcela Zacarias | 6-3,1-6,11-9 |
| UTR Pro Tennis Series California Women | 2020/08/06 17:15 | Hanna Chang v Jessica Failla | 6-2,6-2 |
| UTR Pro Tennis Series California Women | 2020/08/03 18:30 | Sophie Chang v Hanna Chang | 6-4,6-3 |
| UTR Pro Tennis Series California Women | 2020/08/03 17:15 | Sherif, Jwany v Hanna Chang | 2-6,2-6 |
| UTR Pro Tennis Series California Women | 2020/07/31 18:30 | Marcela Zacarias v Hanna Chang | 6-2,6-3 |
| UTR Pro Tennis Series California Women | 2020/07/31 16:15 | Hanna Chang v Closs, Mary | 6-0,6-0 |
| UTR Pro Tennis Series California Women | 2020/07/29 19:45 | Closs, Mary v Hanna Chang | 4-6,0-6 |
| UTR Pro Tennis Series California Women | 2020/08/17 17:15 | Guillermo, Lorraine M v Morgina, Anna | 6-3,2-6,5-10 |
| UTR Pro Tennis Series California Women | 2020/08/15 19:00 | Guillermo, Lorraine M v Sophie Chang | 2-6,3-6 |
| UTR Pro Tennis Series California Women | 2020/08/15 16:00 | Guillermo, Lorraine M v Marcela Zacarias | 6-0,6-2 |
| UTR Pro Tennis Series California Women | 2020/08/12 20:50 | Guillermo, Lorraine M v Marcela Zacarias | 4-6,0-6 |
| UTR Pro Tennis Series California Women | 2020/08/12 16:00 | Kayla Day v Guillermo, Lorraine M | 6-2,2-6,10-3 |
| UTR Pro Tennis Series California Women | 2020/08/11 18:30 | Guillermo, Lorraine M v Davis, Emma | 2-6,6-4,5-10 |
| UTR Pro Tennis Series California Women | 2020/08/11 16:00 | Marcela Zacarias v Guillermo, Lorraine M | 0-6,2-6 |
| UTR Pro Tennis Series California Women | 2020/08/08 18:30 | Guillermo, Lorraine M v Sophie Chang | 1-6,1-6 |