Head to Head
| WTA Houston | 2019/11/10 16:00 | Sophie Chang v Kayla Day | 6-3,3-6,6-3 |
| ITF W60 Honolulu | 2019/07/10 20:00 | Sophie Chang v Kayla Day | 6-7,3-6 |
Home History
| UTR Pro Tennis Series - California - Femenino | 2020/08/12 16:00 | Kayla Day v Lorraine M. Guillermo | 6-2,2-6,10-3 |
| UTR Pro Tennis Series - California - Femenino | 2020/07/30 16:00 | Giuliana Olmos v Kayla Day | 7-6,7-6 |
| UTR Pro Tennis Series - California - Femenino | 2020/07/27 17:15 | Hanna Chang v Kayla Day | 3-6,1-6 |
| UTR Pro Tennis Series - California - Femenino | 2020/07/24 16:00 | Hanna Chang v Kayla Day | 1-6,3-6 |
| UTR Pro Tennis Series - California - Femenino | 2020/07/21 23:55 | Pamela Montez v Kayla Day | 2-6,6-7 |
| US Pro Tennis Series - West Coast - Femenino | 2020/06/25 20:00 | Andrea Gamiz v Kayla Day | 2-6,6-1,10-7 |
| US Pro Tennis Series - West Coast - Femenino | 2020/06/25 18:20 | Kayla Day v Sophia Whittle | 6-2,6-3 |
| US Pro Tennis Series - West Coast - Femenino | 2020/06/24 21:15 | Kayla Day v Rushri Wijesundera | 6-3,6-1 |
Away History
| UTR Pro Tennis Series - California - Femenino | 2020/08/11 19:45 | Sophie Chang v Emma Davis | 6-0,6-2 |
| UTR Pro Tennis Series - California - Femenino | 2020/08/11 17:15 | Sophie Chang v Anna Morgina | 6-4,6-3 |
| UTR Pro Tennis Series - California - Femenino | 2020/08/09 18:30 | Sophie Chang v Anna Morgina | 6-2,2-6,7-10 |
| UTR Pro Tennis Series - California - Femenino | 2020/08/09 16:00 | Charlotte Chavatipon v Sophie Chang | 0-6,6-7 |
| UTR Pro Tennis Series - California - Femenino | 2020/08/08 18:30 | Lorraine M. Guillermo v Sophie Chang | 1-6,1-6 |
| UTR Pro Tennis Series - California - Femenino | 2020/08/07 19:45 | Anna Morgina v Sophie Chang | 3-6,4-6 |
| UTR Pro Tennis Series - California - Femenino | 2020/08/05 17:15 | Sophie Chang v Maegan Manasse | 4-6,6-7 |
| UTR Pro Tennis Series - California - Femenino | 2020/08/04 18:30 | Jessica Failla v Sophie Chang | 6-4,1-6,10-5 |
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