| US Pro Tennis Series - ženy | 05/13 20:55 | 1 | [233] Hailey Baptiste v Marine Partaud [488] | 4-6,0-6 | |
| US Pro Tennis Series - ženy | 05/13 14:30 | 1 | Channelle Van Nguyen v Hailey Baptiste | 3-6,3-6 | |
| US Pro Tennis Series - ženy | 05/11 20:35 | 1 | [368] Alycia Parks v Hailey Baptiste [233] | 3-6,3-6 | |
| US Pro Tennis Series - ženy | 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 | |
| Australian Open - ženy | 01/16 06:45 | 45 | [118] Liudmila Samsonova v Hailey Baptiste [229] | 1-6,6-2,6-2 | |
| Australian Open - ženy | 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 - ženy | 08/22 17:40 | 45 | [268] Hailey Baptiste v Harriet Dart [140] | 5-7,4-6 | |
| US Open - ženy | 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 |
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 four 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 Washington Open, 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 Miami Open.