| WTA Washington | 08/02 23:00 | 26 | [204] Hailey Baptiste v Coco Gauff [7] | 1-6,4-6 | |
| WTA Washington | 08/01 20:00 | 25 | [204] Hailey Baptiste v Karolina Pliskova [23] | 6-1,0-6,6-3 | |
| WTA Washington | 07/30 18:30 | 19 | [205] Hailey Baptiste v Peyton Stearns [57] | 7-6,6-2 | |
| WTA Washington | 07/29 20:05 | 14 | [48] Alycia Parks v Hailey Baptiste [205] | 3-6,1-6 | |
| ITF W60 Dallas | 07/25 17:45 | 25 | [205] Hailey Baptiste v Hanna Chang [325] | Retired | |
| WTA Palermo | 07/15 19:35 | 45 | [215] Hailey Baptiste v Dalila Spiteri [460] | 1-6,6-2,2-6 | |
| WTA Contrexeville | 07/12 12:35 | 26 | [115] Tereza Martincova v Hailey Baptiste [215] | 4-6,6-3,6-2 | |
| WTA Contrexeville | 07/10 13:40 | 25 | [271] Margaux Rouvroy v Hailey Baptiste [215] | 1-6,4-6 | |
| ITF W60 Ricany | 06/14 08:00 | 25 | Miriana Tona v Hailey Baptiste | 6-4,6-2 | |
| ITF W60 Caserta | 06/11 08:30 | 29 | [194] Raluca G Serban v Hailey Baptiste [243] | 3-6,2-6 | |
| ITF W60 Caserta | 06/10 11:00 | 28 | [243] Hailey Baptiste v Anastasia Tikhonova [236] | 6-4,7-5 | |
| ITF W60 Caserta | 06/09 12:50 | 27 | [243] Hailey Baptiste v Elena Malygina [357] | 6-2,6-1 | |
| ITF W60 Caserta | 06/08 17:00 | 26 | [243] Hailey Baptiste v Audrey Albie [253] | 7-5,7-5 | |
| ITF W60 Caserta | 06/06 12:30 | 25 | [179] Selena Janicijevic v Hailey Baptiste [243] | 6-7,0-6 | |
| ITF W60 Brescia | 06/01 10:00 | 26 | [252] Louisa Chirico v Hailey Baptiste [243] | 6-7,7-6,6-4 | |
| ITF W60 Brescia | 05/30 12:00 | 25 | [243] Hailey Baptiste v Mona Barthel [207] | 7-6,2-6,6-4 | |
| ITF W60 Grado | 05/25 16:30 | 27 | [229] Lucie Havlickova v Hailey Baptiste [244] | 6-1,4-6,6-3 | |
| ITF W60 Grado | 05/24 11:25 | 26 | [325] Sofia Costoulas v Hailey Baptiste [244] | 3-6,2-6 | |
| ITF W60 Grado | 05/23 12:55 | 25 | [170] Quinn Gleason v Hailey Baptiste [244] | 1-6,7-5,2-6 | |
| ITF W100 Bonita Springs | 05/04 17:50 | 26 | [197] Marcela Zacarias v Hailey Baptiste [228] | Retired | |
| ITF W100 Bonita Springs | 05/03 20:40 | 25 | [228] Hailey Baptiste v Yue Yuan [116] | 6-4,6-4 | |
| ITF W60 Charlottesville | 04/26 14:00 | 25 | Allie Kiick v Hailey Baptiste | 6-0,3-6,6-3 | |
| ITF W100 Charleston | 04/17 19:30 | 54 | Hailey Baptiste v Chloe Beck | Retired | |
| ITF W25 Boca Raton | 04/16 14:00 | 29 | [152] Caroline Dolehide v Hailey Baptiste [248] | 6-4,6-4 | |
| ITF W25 Boca Raton | 04/15 17:00 | 28 | [248] Hailey Baptiste v Sachia Vickery [178] | 6-4,6-2 | |
| ITF W25 Boca Raton | 04/15 13:00 | 27 | Yulia Starodubtsewa v Hailey Baptiste | 3-6,0-6 | |
| ITF W25 Boca Raton | 04/14 15:00 | 26 | [248] Hailey Baptiste v Louisa Chirico [168] | 6-4,2-6,7-5 | |
| ITF W25 Boca Raton | 04/13 13:50 | 25 | [248] Hailey Baptiste v Jamie Loeb [243] | 6-1,6-4 | |
| WTA Charleston | 04/05 17:05 | 25 | [275] Hailey Baptiste v Madison Keys [22] | 1-6,2-6 | |
| WTA Charleston | 04/04 18:35 | 24 | [55] Xiyu Wang v Hailey Baptiste [275] | 3-6,3-6 |
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.