Kayla Day
| WTA Newport Beach | 01/22 21:20 | 25 | [311] Kayla Day v Eugenie Bouchard [79] | 6-2,3-6,2-6 | |
| WTA Newport Beach | 01/21 23:40 | 24 | [169] Danielle Lao v Kayla Day [311] | 0-6,2-6 | |
| ITF Women Las Vegas | 11/07 01:00 | 25 | [300] Kayla Day v Lauren Davis [252] | 4-6,2-6 | |
| ITF Women Tyler | 11/02 16:30 | 27 | [39] Belinda Bencic v Kayla Day [323] | 4-6,6-2,6-2 | |
| ITF Women Tyler | 11/01 16:35 | 26 | [323] Kayla Day v Christina McHale [153] | 6-4,7-6 | |
| ITF Women Tyler | 10/31 15:00 | 25 | [304] Ann Li v Kayla Day [323] | 2-6,5-7 | |
| ITF Women Macon | 10/27 15:55 | 27 | [302] Kayla Day v Allie Kiick [171] | 2-6,5-7 | |
| ITF Women Macon | 10/25 13:30 | 26 | [302] Kayla Day v Lauren Davis [262] | 6-4,6-4 | |
| ITF Women Macon | 10/24 14:00 | 25 | [139] Claire Liu v Kayla Day [302] | 6-7,4-6 | |
| ITF Women Florence | 10/18 16:00 | 26 | [317] Paula C Goncalves v Kayla Day [291] | 6-4,6-4 | |
| ITF Women Florence | 10/16 18:30 | 25 | [311] Manon Arcangioli v Kayla Day [291] | 3-6,3-6 | |
| ITF Women Stockton | 10/02 20:50 | 25 | [137] Sofya Zhuk v Kayla Day [284] | 6-3,7-6 | |
| ITF Women Templeton | 09/27 01:00 | 25 | [66] Taylor Townsend v Kayla Day [278] | 6-1,6-4 | |
| WTA Quebec City | 09/09 17:40 | 64 | [197] Sesil Karatantcheva v Kayla Day [296] | Retired | |
| WTA Quebec City | 09/08 22:50 | 45 | [296] Kayla Day v Sabrina Santamaria [59] | 6-7,6-4,6-3 | |
| WTA Quebec City | 09/08 22:20 | 45 | Kayla Day v Maria Sanchez | Cancelled | |
| WTA Chicago | 09/03 16:25 | 64 | [296] Kayla Day v Robin Anderson [320] | 6-2,3-6,6-7 | |
| WTA Chicago | 09/02 16:30 | 45 | [170] Marie Bouzkova v Kayla Day [296] | Retired | |
| US Open - Damer | 08/21 18:25 | 44 | [247] Jessica Pegula v Kayla Day [295] | 6-3,6-1 | |
| ITF Women Brescia | 06/05 12:50 | 25 | [278] Diana Marcinkevica v Kayla Day [189] | 6-0,6-1 | |
| ITF Women Grado | 05/29 12:35 | 25 | [250] Georgia Brescia v Kayla Day [189] | 6-2,6-2 | |
| French Open Women Qual | 05/22 13:25 | 44 | [158] Anna Kalinskaya v Kayla Day [192] | 6-2,6-0 | |
| ITF Women Charleston | 05/01 16:15 | 25 | [179] Kayla Day v Jessica Pegula [383] | 6-7,0-6 | |
| ITF Women Charlottesville | 04/26 17:35 | 25 | [183] Kayla Day v Ana Sofia Sanchez [280] | 2-6,2-6 | |
| ITF Women Dothan | 04/18 18:50 | 25 | [235] Francesca Di Lorenzo v Kayla Day [183] | 6-2,6-0 | |
| ITF Women Indian Harbour | 04/11 23:55 | 25 | [83] Madison Brengle v Kayla Day [182] | 6-4,6-3 | |
| WTA Charleston Kval | 04/01 16:00 | 46 | [154] Georgina Garcia-Perez v Kayla Day [183] | 6-2,6-7,6-4 | |
| WTA Charleston Kval | 03/31 18:35 | 45 | [425] Anastasia Rodionova v Kayla Day [183] | 6-7,7-6,4-6 | |
| WTA Indian Wells | 03/08 19:00 | 23 | Yanina Wickmayer v Kayla Day | 6-3,6-2 | |
| WTA Acapulco | 02/27 22:00 | 25 | Kayla Day v Arantxa Rus | 6-4,1-6,0-6 |
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.