| French Open Women | 05/24 08:00 | 15 | [232] Miriam Bulgaru v Kayla Day [138] | 4-6,1-6 | |
| French Open Women | 05/22 13:30 | 14 | [201] Dalila Jakupovic v Kayla Day [138] | 1-6,1-6 | |
| ITF W60 Naples | 05/13 15:55 | 28 | [499] Yulia Starodubtsewa v Kayla Day [137] | 3-6,6-2,6-1 | |
| ITF W60 Naples | 05/12 15:00 | 27 | [226] Astra Sharma v Kayla Day [137] | 2-6,3-6 | |
| ITF W60 Naples | 05/11 14:50 | 26 | [189] Christina Rosca v Kayla Day [137] | 1-6,0-6 | |
| ITF W60 Naples | 05/10 16:35 | 25 | [440] Noelia Z Melgar v Kayla Day [137] | 0-6,1-6 | |
| ITF W100 Bonita Springs | 05/07 17:25 | 29 | [229] Ann Li v Kayla Day [183] | 2-6,2-6 | |
| ITF W100 Bonita Springs | 05/06 16:55 | 28 | [123] Caroline Dolehide v Kayla Day [183] | 6-7,6-1,0-6 | |
| ITF W100 Bonita Springs | 05/05 17:40 | 27 | [183] Kayla Day v Marcela Zacarias [197] | 7-5,6-3 | |
| ITF W100 Bonita Springs | 05/04 17:45 | 26 | [183] Kayla Day v Katarzyna Kawa [218] | 6-2,6-2 | |
| ITF W100 Bonita Springs | 05/03 17:05 | 25 | Kayla Day v Emma Bardet | 6-2,6-1 | |
| ITF W60 Charlottesville | 04/28 19:30 | 27 | [183] Kayla Day v Emma Navarro [101] | 3-6,1-6 | |
| ITF W60 Charlottesville | 04/27 13:55 | 26 | Kayla Day v Allie Kiick | 6-1,6-1 | |
| ITF W60 Charlottesville | 04/26 16:25 | 25 | [183] Kayla Day v Makenna Jones [466] | 6-2,6-2 | |
| ITF W100 Charleston | 04/20 16:40 | 26 | [114] Nao Hibino v Kayla Day [181] | 6-1,6-2 | |
| ITF W100 Charleston | 04/19 18:45 | 25 | [181] Kayla Day v En Shuo Liang [314] | 6-2,6-1 | |
| ITF W25 Boca Raton | 04/12 13:00 | 25 | [307] Francesca Di Lorenzo v Kayla Day [182] | 6-4,6-1 | |
| WTA Charleston | 04/03 18:15 | 24 | [184] Kayla Day v Sachia Vickery [187] | 4-6,2-6 | |
| WTA Charleston | 04/02 15:35 | 19 | [190] Ann Li v Kayla Day [187] | 2-6,4-6 | |
| WTA Charleston | 04/01 18:45 | 14 | [202] Gabriela Lee v Kayla Day [187] | 2-6,6-7 | |
| ITF W25 Fredericton | 03/08 22:00 | 25 | [186] Kayla Day v Gabriela Andrea Knutson [384] | 4-6,1-6 | |
| WTA Austin | 02/25 19:25 | 45 | [188] Kayla Day v Elina Avanesyan [170] | 6-7,4-6 | |
| ITF W60 Irapuato | 02/17 01:00 | 26 | [188] Kayla Day v Nadia Podoroska [113] | 5-7,2-6 | |
| ITF W60 Irapuato | 02/16 03:55 | 25 | [230] Jamie Loeb v Kayla Day [188] | 3-6,3-6 | |
| ITF W60 Rome GA | 02/01 17:30 | 25 | [189] Kayla Day v Robin Montgomery [212] | 6-7,6-7 | |
| ITF W25 Orlando | 01/27 16:15 | 27 | [193] Kayla Day v Peyton Stearns [209] | 3-6,0-6 | |
| ITF W25 Orlando | 01/26 17:00 | 26 | [193] Kayla Day v Kayla Cross [462] | 6-3,6-0 | |
| ITF W25 Orlando | 01/25 14:30 | 25 | [193] Kayla Day v Ashley Lahey [363] | 6-3,6-2 | |
| ITF W60 Vero Beach | 01/18 17:55 | 25 | [193] Kayla Day v Katarzyna Kawa [242] | 3-6,6-1,6-7 | |
| Australian Open Women | 01/10 23:00 | 15 | [109] Leolia Jeanjean v Kayla Day [194] | 7-6,1-6,6-1 |
Wikipedia - Kayla Day
Kayla Day (born September 28, 1999) is an American professional tennis player. She has a career-high singles ranking of world No. 84 by the WTA. As a junior, she won one junior Grand Slam title, at the 2016 US Open. There, she finished runner-up in the doubles event, partnering with Caroline Dolehide.
Despite having success as junior, Day has mostly spent time playing on the ITF Women's Circuit instead of WTA Tour, due to her ranking. She officially turned professional in 2017, at the Australian Open.