| US Pro Tennis Series - nők | 05/11 16:30 | 1 | [233] Hailey Baptiste v Panna Udvardy [358] | 6-4,6-3 | |
| WTA Indian Wells | 03/02 21:10 | 24 | [247] Hailey Baptiste v Katie Boulter [396] | 5-7,3-6 | |
| ITF W25 Rancho Santa Fe | 02/28 19:15 | 28 | [192] Xiaodi You v Hailey Baptiste [249] | 6-3,6-2 | |
| ITF W25 Rancho Santa Fe | 02/27 19:00 | 27 | [249] Hailey Baptiste v Olga Danilovic [178] | 4-6,6-3,6-0 | |
| ITF W25 Rancho Santa Fe | 02/26 18:00 | 26 | [231] Gabriela Ce v Hailey Baptiste [249] | 1-6,3-6 | |
| ITF W25 Rancho Santa Fe | 02/25 21:40 | 25 | [451] Kayla Day v Hailey Baptiste [249] | Retired | |
| ITF W100 Nicholasville | 02/10 18:55 | 54 | [240] Hailey Baptiste v Francoise Abanda [377] | 4-6,6-4,7-10 | |
| WTA Newport Beach | 01/28 18:45 | 25 | [124] Nicole Gibbs v Hailey Baptiste [232] | 6-4,6-4 | |
| WTA Newport Beach | 01/27 21:40 | 24 | [423] Kayla Day v Hailey Baptiste [232] | 6-4,4-6,3-6 | |
| Ausztrál Open - nők | 01/16 06:45 | 45 | [118] Liudmila Samsonova v Hailey Baptiste [229] | 1-6,6-2,6-2 | |
| Ausztrál Open - nők | 01/14 00:00 | 44 | [234] Kyoka Okamura v Hailey Baptiste [229] | 1-6,4-6 | |
| ITF W25 Tucson | 11/24 20:00 | 29 | [301] Marcela Zacarias v Hailey Baptiste [269] | 6-4,4-6,3-6 | |
| ITF W25 Tucson | 11/23 20:45 | 28 | Hailey Baptiste v Katie Volynets | 6-1,7-6 | |
| ITF W25 Tucson | 11/23 16:30 | 27 | [269] Hailey Baptiste v Sophia Whittle [486] | 7-5,6-3 | |
| ITF W25 Tucson | 11/22 20:15 | 26 | Hailey Baptiste v Tori Kinard | 6-4,7-6 | |
| ITF W25 Tucson | 11/20 23:10 | 25 | Hailey Baptiste v Nastja Kolar | 6-3,7-6 | |
| WTA Houston | 11/12 21:40 | 25 | [279] Hailey Baptiste v Kirsten Flipkens [94] | 6-3,3-6,6-7 | |
| WTA Houston | 11/11 16:00 | 24 | [279] Hailey Baptiste v Elitsa Kostova [197] | 6-2,6-4 | |
| ITF W60 Asuncion | 10/29 22:20 | 25 | Hailey Baptiste v Lara Escauriza | 5-7,4-6 | |
| ITF W25 Hilton Head Island | 10/09 17:55 | 25 | Hailey Baptiste v Emiliana Arango | 4-6,6-7 | |
| ITF W60 Charleston | 10/03 16:15 | 26 | [253] Hailey Baptiste v Grace Min [374] | 3-6,6-2,5-7 | |
| ITF W60 Charleston | 10/02 19:40 | 25 | [253] Hailey Baptiste v Sophie Chang [372] | 6-4,6-3 | |
| ITF W60 Templeton | 09/26 18:25 | 26 | [407] Emina Bektas v Hailey Baptiste [261] | 7-5,4-6,6-4 | |
| ITF W60 Templeton | 09/24 20:10 | 25 | [397] Marcela Zacarias v Hailey Baptiste [261] | 5-7,7-6,2-6 | |
| US Open - nők | 08/22 17:40 | 45 | [268] Hailey Baptiste v Harriet Dart [140] | 5-7,4-6 | |
| US Open - nők | 08/20 16:40 | 44 | [198] Anna Bondar v Hailey Baptiste [268] | 3-6,1-6 | |
| WTA Washington | 08/01 01:00 | 26 | [49] Kristina Mladenovic v Hailey Baptiste [283] | 6-4,4-6,6-3 | |
| WTA Washington | 07/30 22:15 | 25 | [283] Hailey Baptiste v Madison Keys [17] | 7-6,6-2 | |
| ITF W60 Berkeley | 07/19 00:00 | 26 | [290] Hailey Baptiste v Caroline Dolehide [256] | 4-6,4-6 | |
| ITF W60 Berkeley | 07/17 17:00 | 25 | [258] Katie Swan v Hailey Baptiste [290] | 5-7,3-6 |
Hailey Baptiste (born November 3, 2001) is an American professional tennis player. On 18 March 2024, she reached her best singles ranking of world No. 96. She has won one doubles title on the WTA Tour with one doubles title on the WTA Challenger Tour. She has also won four singles and three doubles titles on the ITF Women's Circuit.
On the junior tour, she reached a career-high ranking of No. 38 on January 29, 2018. She ended runner-up at the US Open junior doubles' tournament in 2018.
Baptiste made her WTA Tour main draw debut at her hometown tournament, the 2019 Citi Open in Washington, beating Grand Slam finalist and former top-ten player Madison Keys in the first round.
Baptiste made her World TeamTennis debut in 2020 with the Vegas Rollers as an alternate, later ending up on the roster for the New York Empire in the 2020 season at The Greenbrier.
She made her WTA 1000 debut at the 2021 Miami Open after reaching the main draw having received a wildcard for the qualifying competition.
She received a wildcard for the main draw at the 2023 Miami Open.
At the WTA 1000 Guadalajara Open, she defeated 16th seed Karolína Plíšková for the second time in the season having prevailed also earlier at the Washington Open.
Following her first round main-draw win as a qualifier at the 2024 Indian Wells Open, over fellow American qualifier Robin Montgomery, she reached the top 100 in the rankings on 18 March 2024. She received a wildcard for the main draw at the 2024 Miami Open.