| WTA - Buenos Aires | 11/17 13:30 | 26 | [160] Maria Lourdes Carle v Hailey Baptiste [182] | 6-4,6-0 | |
| WTA - Buenos Aires | 11/15 15:15 | 25 | [146] Harmony Tan v Hailey Baptiste [182] | Retired | |
| US Open - Feminin | 08/23 23:00 | 14 | [88] Viktorija Golubic v Hailey Baptiste [157] | 6-4,6-4 | |
| WTA - Cincinnati | 08/13 17:40 | 14 | [151] Hailey Baptiste v Magda Linette [70] | 3-6,0-6 | |
| WTA - Washington | 08/01 18:20 | 25 | [7] Jessica Pegula v Hailey Baptiste [148] | 6-2,6-2 | |
| French Open - Feminin | 05/24 14:25 | 23 | [36] Anhelina Kalinina v Hailey Baptiste [123] | Retired | |
| French Open - Feminin | 05/20 14:05 | 19 | [167] Nastasja Schunk v Hailey Baptiste [125] | 5-7,6-4,2-6 | |
| French Open - Feminin | 05/18 14:05 | 15 | [153] Julia Grabher v Hailey Baptiste [125] | 6-1,3-6,2-6 | |
| French Open - Feminin | 05/16 16:15 | 14 | [162] Olivia Gadecki v Hailey Baptiste [125] | 7-5,3-6,5-7 | |
| WTA - Paris | 05/12 09:00 | 26 | [126] Hailey Baptiste v Beatriz Haddad Maia [52] | 6-3,3-6,2-6 | |
| WTA - Paris | 05/10 09:40 | 25 | [203] Anastasia Zakharova v Hailey Baptiste [126] | 6-7,4-6 | |
| ITF - W100 Charleston | 04/28 17:00 | 26 | [127] Hailey Baptiste v Gabriela Ce [292] | 6-4,4-6,4-6 | |
| ITF - W100 Charleston | 04/27 20:40 | 25 | [127] Hailey Baptiste v Grace Min [186] | 6-3,1-6,7-5 | |
| ITF - W100 Palm Harbor | 04/13 17:00 | 25 | Hailey Baptiste v Louisa Chirico | 3-6,3-6 | |
| ITF - W100 Palm Harbor | 04/13 17:00 | 25 | Hailey Baptiste v Emina Bektas | Cancelled | |
| WTA - Charleston | 04/06 14:00 | 25 | [34] Alize Cornet v Hailey Baptiste [124] | 6-3,6-2 | |
| WTA - Charleston | 04/05 14:00 | 24 | [55] Elena Gabriela Ruse v Hailey Baptiste [124] | 3-6,0-6 | |
| WTA - Miami | 03/23 15:00 | 23 | [122] Hailey Baptiste v Irina-Camelia Begu [70] | 7-6,1-6,1-6 | |
| WTA - Indian Wells | 03/09 22:10 | 23 | [39] Ajla Tomljanovic v Hailey Baptiste [119] | 6-2,2-6,6-2 | |
| WTA - Monterrey | 02/27 18:40 | 19 | [102] Diane Parry v Hailey Baptiste [131] | 6-2,6-1 | |
| WTA - Monterrey | 02/26 23:05 | 14 | [450] Maria Portillo Ramirez v Hailey Baptiste [131] | 4-6,6-2,3-6 | |
| WTA - Guadalajara | 02/25 02:25 | 26 | [45] Maria Camila Osorio v Hailey Baptiste [131] | 1-6,6-3,6-3 | |
| WTA - Guadalajara | 02/22 20:00 | 25 | [131] Hailey Baptiste v Viktoria Kuzmova [140] | 6-3,6-3 | |
| WTA - Guadalajara | 02/20 19:05 | 19 | [131] Hailey Baptiste v Victoria Jimenez Kasintseva [191] | 6-3,6-4 | |
| WTA - Guadalajara | 02/19 18:35 | 14 | Hailey Baptiste v Marcela Zacarias | 6-1,6-3 | |
| ITF - W60 Rome, GA | 02/03 20:00 | 26 | [137] Hailey Baptiste v Katie Volynets [159] | 1-6,2-6 | |
| ITF - W60 Rome, GA | 02/01 19:10 | 25 | [137] Hailey Baptiste v En Shuo Liang [188] | 6-3,6-2 | |
| ITF - W60 Orlando | 01/29 17:10 | 27 | [171] Christina McHale v Hailey Baptiste [165] | 6-2,6-1 | |
| ITF - W60 Orlando | 01/28 19:20 | 26 | Sachia Vickery v Hailey Baptiste | 2-6,6-4,2-6 | |
| ITF - W60 Orlando | 01/27 15:00 | 25 | [280] Ashlyn Krueger v Hailey Baptiste [165] | 3-6,2-6 |
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 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.