Name: Kayla Day
Country: USA
Birthdate: 28.09.99, 24 years
WTA ranking: 86
TOP ranking's position: 84 (01.04.24, 84000 points)
Points: 844
Prize money: 860655 $
Matches total: 418
Win: 243
%: 58.13 %
Country: USA
Birthdate: 28.09.99, 24 years
WTA ranking: 86
TOP ranking's position: 84 (01.04.24, 84000 points)
Points: 844
Prize money: 860655 $
Matches total: 418
Win: 243
%: 58.13 %
| year | summary | Hard | Clay | I. hard | Carpet | Grass | Acrylic |
| 2024 | 7/11 | 2/9 | 5/2 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2023 | 41/25 | 22/15 | 18/7 | 0/2 | 0/0 | 1/1 | 0/0 |
| 2022 | 41/22 | 26/15 | 13/6 | 2/1 | 0/0 | 0/0 | 0/0 |
| 2021 | 18/12 | 12/7 | 6/5 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2020 | 20/11 | 6/5 | 14/4 | 0/2 | 0/0 | 0/0 | 0/0 |
| 2019 | 18/20 | 11/14 | 7/6 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2018 | 11/23 | 9/14 | 1/8 | 1/1 | 0/0 | 0/0 | 0/0 |
| 2017 | 29/24 | 12/13 | 10/6 | 4/3 | 0/0 | 3/2 | 0/0 |
| 2016 | 46/18 | 26/9 | 16/8 | 0/0 | 0/0 | 4/1 | 0/0 |
| 2015 | 11/7 | 7/4 | 3/2 | 0/0 | 0/0 | 1/1 | 0/0 |
| 2014 | 1/2 | 1/2 | 0/0 | 0/0 | 0/0 | 0/0 | 0/0 |
| TOTAL | 243/175 | 134/107 | 93/54 | 7/9 | 0/0 | 9/5 | 0/0 |
| perc. % | 58.13 % | 55.6 % | 63.27 % | 43.75 % | 0 % | 64.29 % | 0 % |
Kayla Day / scheduled / last
| 18.04.24 09:00 | 2nd round | Kayla Day  | Susan Bandecchi | 7-65, 5-7, 7-5 | match details |  W75 Chiasso | Clay |
Kayla Day form / year 2015
Kayla Day / year 2015
| 14.09.15 | q 1 | Klara Fabikova | Kayla Day | 3-6, 7-61, 6-3 |  | match details |  Redding | Hard |
| 06.09.15 | 1st round | Tereza Mihalikova | Kayla Day | 7-5, 7-63 | | match details | U.S. Open | Hard |
| 07.07.15 | 2nd round | Fanny Stollar | Kayla Day | 7-5, 7-5 | | match details |  Wimbledon (juniors) | Grass |
| 04.07.15 | 1st round | Kayla Day | Tessah Andrianjafitrimo | 7-65, 6-3 |  | match details | ||
| 15.06.15 | q 2 | Kayla Day | Petra Januskova | 6-2, 6-1 | | match details | Sumter | Hard |
| 15.06.15 | qual. | Kayla Day | Jennifer Elie | 6-1, 6-4 | | match details | ||
| 15.06.15 | q 1 | Kayla Day | Shauna Williams | 6-0, 6-1 | | match details | ||
| 15.06.15 | 1st round | Jan Abaza | Kayla Day | 6-1, 7-5 | | match details | ||
| 08.06.15 | 1st round | Kayla Day | Ana Paula Neffa De Los Rios | 1-6, 6-4, 6-2 | | match details | Charlotte | Clay |
| 08.06.15 | 2nd round | Kayla Day | Caroline Lampl | 3-6, 6-4, 6-2 | | match details | ||
| 08.06.15 | 1/4 | Kourtney J. Keegan | Kayla Day | 7-5, 6-4 | | match details | ||
| 11.05.15 | q 2 | Usue Maitane Arconada | Kayla Day | 6-3, 4-6, 6-4 | | match details | Raleigh | Clay |
| 11.05.15 | q 1 | Kayla Day | Ashley Mackey | 4-6, 6-1, 6-4 | | match details | ||
| 23.02.15 | 2nd round | Indy De Vroome | Kayla Day | 6-2, 6-0 | | match details | Rancho Santa | Hard |
| 23.02.15 | qual. | Kayla Day | Charlotte Petrick | 6-4, 6-2 | | match details | ||
| 23.02.15 | 1st round | Kayla Day | Mari Osaka | 4-6, 6-2, 6-2 | | match details | ||
| 23.02.15 | q 1 | Kayla Day | Riley Mcquaid | 6-2, 3-6, 6-0 | | match details | ||
| 23.02.15 | q 2 | Kayla Day | Elizabeth Halbauer | 7-5, 6-78, 6-1 | | match details |