Stadium: Court 1
| 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 |
| US Pro Tennis Series West Coast Women | 2020/06/03 20:50 | Hanna Chang v Giuliana Olmos | 0-6,0-6 |
| US Pro Tennis Series West Coast Women | 2020/06/03 17:35 | Closs, Mary v Hanna Chang | 1-6,3-6 |
| US Pro Tennis Series West Coast Women | 2020/06/01 19:10 | Giuliana Olmos v Hanna Chang | 6-3,7-5 |
| US Pro Tennis Series West Coast Women | 2020/06/01 17:15 | Hanna Chang v Montez, Pamela | 1-6,2-6 |
| Irapuato, Singles W-ITF-MEX-02A | 2020/03/11 19:55 | Xu, Shilin v Hanna Chang | 3-6,2-6 |
| Irapuato, Singles W-ITF-MEX-02A | 2020/03/09 23:30 | Hanna Chang v Giuliana Olmos | 6-2,7-5 |
| WTA - Indian Wells | 2020/03/04 22:50 | Hanna Chang v Nara, Kurumi | 1-6,3-6 |
| WTA - Indian Wells | 2020/03/02 18:00 | Lao, Danielle v Hanna Chang | 6-1,5-7,6-2 |
| US Pro Tennis Series West Coast Women | 2020/06/02 20:20 | Montez, Pamela v Guillermo, Lorraine M | 6-1,6-3 |
| US Pro Tennis Series West Coast Women | 2020/06/02 17:55 | Guillermo, Lorraine M v Ena Shibahara | 7-5,4-6,5-10 |
| Las Vegas, Singles W-ITF-USA-08A | 2020/03/02 18:00 | Chavatipon, Charlotte v Guillermo, Lorraine M | 0-6,6-3,10-4 |
| Rancho Santa Fe, Ca, Singles W-ITF-USA-05A | 2020/02/24 21:10 | Guillermo, Lorraine M v Olga Danilovic | 4-6,6-2,1-6 |
| ITF W25 Malibu | 2020/01/14 21:00 | Guillermo, Lorraine M v Solymar Colling | 2-6,3-6 |
| ITF W25 Malibu | 2020/01/13 18:30 | Guillermo, Lorraine M v Tobita, Alyssa | 6-0,6-2 |
| ITF W15 Norman | 2019/12/04 20:55 | Jessica Failla v Guillermo, Lorraine M | 6-4,6-1 |
| Tucson, Singles W-ITF-USA-46A | 2019/11/22 18:00 | Kobelt, Madeleine v Guillermo, Lorraine M | 7-5,1-6,6-3 |