| 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 - nők | 05/24 14:25 | 23 | [36] Anhelina Kalinina v Hailey Baptiste [123] | Retired | |
| French Open - nők | 05/20 14:05 | 19 | [167] Nastasja Schunk v Hailey Baptiste [125] | 5-7,6-4,2-6 | |
| French Open - nők | 05/18 14:05 | 15 | [153] Julia Grabher v Hailey Baptiste [125] | 6-1,3-6,2-6 | |
| French Open - nők | 05/16 16:15 | 14 | [162] Olivia Gadecki v Hailey Baptiste [125] | 7-5,3-6,5-7 | |
| WTA Párizs | 05/12 09:00 | 26 | [126] Hailey Baptiste v Beatriz Haddad Maia [52] | 6-3,3-6,2-6 | |
| WTA Párizs | 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 | |
| Ausztrál Open - nők | 01/20 01:40 | 24 | [165] Hailey Baptiste v Maddison Inglis [133] | 6-7,6-2,2-6 | |
| Ausztrál Open - nők | 01/18 02:10 | 23 | [165] Hailey Baptiste v Caroline Garcia [70] | 4-6,7-6,6-3 | |
| Ausztrál Open - nők | 01/14 02:25 | 19 | [168] Hailey Baptiste v Yue Yuan [162] | 6-7,7-6,6-3 |
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 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.