Head to Head
| US Pro Tennis Series West Coast Women | 2020/06/17 19:50 | Hanna Chang v Kayla Day | 5-7,6-4,11-9 |
| US Pro Tennis Series West Coast Women | 2020/06/12 17:55 | Hanna Chang v Kayla Day | 7-6,6-0 |
| ITF W60 Berkeley | 2019/07/17 19:00 | Kayla Day v Hanna Chang | 6-2,4-6,4-6 |
Home History
| UTR Pro Tennis Series California Women | 2020/07/22 18:30 | Hanna Chang v Anna Morgina | 6-3,6-3 |
| UTR Pro Tennis Series California Women | 2020/07/22 17:15 | Hanna Chang v Mary Closs | 6-2,6-1 |
| UTR Pro Tennis Series California Women | 2020/07/20 18:30 | Lorraine M. Guillermo v Hanna Chang | 1-6,2-6 |
| UTR Pro Tennis Series California Women | 2020/07/20 17:15 | Hanna Chang v Charlotte Chavatipon | 6-4,6-2 |
| UTR Pro Tennis Series California Women | 2020/07/17 18:30 | Hanna Chang v Pamela Montez | 6-4,6-2 |
| UTR Pro Tennis Series California Women | 2020/07/17 17:15 | Mary Closs v Hanna Chang | 3-6,3-6 |
| UTR Pro Tennis Series California Women | 2020/07/15 18:30 | Hanna Chang v Marcela Zacarias | 6-4,6-4 |
| UTR Pro Tennis Series California Women | 2020/07/15 16:00 | Hanna Chang v Elvina Kalieva | 4-6,7-5,4-10 |
Away History
| UTR Pro Tennis Series California Women | 2020/07/21 23:55 | Pamela Montez v Kayla Day | 2-6,6-7 |
| US Pro Tennis Series West Coast Women | 2020/06/25 20:00 | Andrea Gamiz v Kayla Day | 2-6,6-1,10-7 |
| US Pro Tennis Series West Coast Women | 2020/06/25 18:20 | Kayla Day v Sophia Whittle | 6-2,6-3 |
| US Pro Tennis Series West Coast Women | 2020/06/24 21:15 | Kayla Day v Rushri Wijesundera | 6-3,6-1 |
| US Pro Tennis Series West Coast Women | 2020/06/24 17:50 | Kayla Day v Lorraine M. Guillermo | 6-2,6-2 |
| US Pro Tennis Series West Coast Women | 2020/06/21 21:40 | Kayla Day v Elvina Kalieva | 4-6,5-7 |
| US Pro Tennis Series West Coast Women | 2020/06/21 17:40 | Andrea Gamiz v Kayla Day | 5-7,5-7 |
| US Pro Tennis Series West Coast Women | 2020/06/20 20:55 | Kayla Day v Elvina Kalieva | 6-1,6-4 |