Head to Head
| ITF W60 Rome GA | 2022/02/01 15:00 | Lulu Sun v Kayla Day | 6-3,7-5 |
Home History
| ITF W75 Charlottesville | 2024/04/26 17:45 | Kayla Day v Varvara Lepchenko | 7-6,7-5 |
| ITF W75 Charlottesville | 2024/04/25 15:00 | Kayla Day v Sophie Chang | 7-5,6-4 |
| ITF W75 Charlottesville | 2024/04/24 14:00 | Kayla Day v Sahaja Yamalapalli | 6-2,6-0 |
| ITF W75 Chiasso | 2024/04/19 14:10 | Kayla Day v Berfu Cengiz | 6-2,4-6,3-6 |
| ITF W75 Chiasso | 2024/04/18 12:40 | Kayla Day v Susan Bandecchi | 7-6,5-7,7-5 |
| ITF W75 Chiasso | 2024/04/17 07:55 | Kayla Day v Anna Gabric | 6-4,1-6,6-1 |
| ITF W75 Bellinzona | 2024/04/13 11:30 | Kayla Day v Anna Bondar | 2-6,5-7 |
| ITF W75 Bellinzona | 2024/04/12 12:00 | Kayla Day v Lesley Pattinama Kerkhove | 6-0,6-7,6-3 |
Away History
| ITF W75 Charlottesville | 2024/04/26 14:50 | Lulu Sun v Elvina Kalieva | 6-2,3-6,6-4 |
| ITF W75 Charlottesville | 2024/04/23 18:25 | Lulu Sun v Robin Anderson | 6-3,6-3 |
| Billie Jean King Cup | 2024/04/13 04:55 | Ankita Raina v Lulu Sun | 2-6,0-6 |
| Billie Jean King Cup | 2024/04/12 03:55 | Ya-Yi Yang v Lulu Sun | 1-6,2-6 |
| Billie Jean King Cup | 2024/04/11 03:15 | Xiyu Wang v Lulu Sun | 6-4,6-0 |
| Billie Jean King Cup | 2024/04/09 03:55 | Su Jeong Jang v Lulu Sun | 6-4,6-0 |
| ITF W75 Ricany | 2024/03/14 11:05 | Anastasia Tikhonova v Lulu Sun | 6-2,4-6,6-4 |
| ITF W75 Ricany | 2024/03/13 15:50 | Talia Gibson v Lulu Sun | 4-6,5-7 |