| Open da Austrália - Feminino | 01/20 01:40 | 24 | [165] Hailey Baptiste v Maddison Inglis [133] | 6-7,6-2,2-6 | |
| Open da Austrália - Feminino | 01/18 02:10 | 23 | [165] Hailey Baptiste v Caroline Garcia [70] | 4-6,7-6,6-3 | |
| Open da Austrália - Feminino | 01/14 02:25 | 19 | [168] Hailey Baptiste v Yue Yuan [162] | 6-7,7-6,6-3 | |
| Open da Austrália - Feminino | 01/12 04:40 | 15 | [118] Nina Stojanovic v Hailey Baptiste [168] | 3-6,4-6 | |
| Open da Austrália - Feminino | 01/09 23:00 | 14 | [168] Hailey Baptiste v Samantha Murray Sharan [290] | 6-1,6-7,7-6 | |
| WTA - Melbourne 2 | 01/04 02:00 | 19 | [168] Hailey Baptiste v Kamilla Rakhimova [120] | 4-6,0-6 | |
| WTA - Melbourne 2 | 01/03 04:15 | 14 | [95] Panna Udvardy v Hailey Baptiste [168] | 3-6,2-6 | |
| WTA - Midland | 11/01 19:10 | 25 | [316] Danielle Lao v Hailey Baptiste [165] | 3-6,6-3,6-1 | |
| ITF - W80 Tyler | 10/26 18:40 | 25 | [166] Hailey Baptiste v Tessah Andrianjafitrimo [192] | 2-6,2-6 | |
| ITF - W80 Macon | 10/20 22:00 | 25 | [289] Emma Navarro v Hailey Baptiste [166] | 6-2,6-4 | |
| WTA - Indian Wells | 10/04 18:00 | 14 | [66] Martina Trevisan v Hailey Baptiste [168] | 6-2,6-4 | |
| WTA - Chicago | 09/29 20:15 | 25 | [34] Victoria Azarenka v Hailey Baptiste [174] | 6-2,4-6,6-3 | |
| WTA - Chicago | 09/28 14:00 | 24 | [174] Hailey Baptiste v Jasmine Paolini [61] | 7-5,6-3 | |
| WTA - Columbus | 09/22 17:55 | 26 | [178] Hailey Baptiste v Nuria Parrizas-Diaz [86] | 2-6,3-6 | |
| WTA - Columbus | 09/20 14:00 | 25 | [177] Jamie Loeb v Hailey Baptiste [178] | 1-6,3-6 | |
| Open dos EUA - Feminino | 08/31 15:00 | 23 | [181] Hailey Baptiste v Shuai Zhang [49] | 3-6,4-6 | |
| WTA - Chicago - Qualificação | 08/21 18:45 | 14 | [116] Kimberley Zimmermann v Hailey Baptiste [181] | 6-2,6-4 | |
| WTA - Chicago | 08/19 20:00 | 26 | [101] Clara Tauson v Hailey Baptiste [181] | 6-2,3-6,6-3 | |
| WTA - Chicago | 08/17 16:00 | 25 | [181] Hailey Baptiste v Danka Kovinic [66] | 6-3,6-4 | |
| WTA - Berlim | 06/15 10:55 | 25 | [26] Jessica Pegula v Hailey Baptiste [166] | Retired | |
| WTA - Berlim | 06/13 09:00 | 19 | [162] Priscilla Hon v Hailey Baptiste [203] | 3-6,5-7 | |
| WTA - Berlim | 06/12 09:00 | 14 | [203] Hailey Baptiste v Jaqueline Cristian [152] | 6-3,6-1 | |
| Open de França - Feminino | 06/03 09:00 | 24 | [5] Sofia Kenin v Hailey Baptiste [203] | 7-5,6-3 | |
| Open de França - Feminino | 05/31 11:25 | 23 | [203] Hailey Baptiste v Anna Blinkova [77] | 6-1,6-4 | |
| Open de França - Feminino | 05/28 08:30 | 19 | [194] Julia Grabher v Hailey Baptiste [202] | 6-3,5-7,3-6 | |
| Open de França - Feminino | 05/26 16:25 | 15 | [202] Hailey Baptiste v Claire Liu [130] | 6-3,6-3 | |
| Open de França - Feminino | 05/25 11:30 | 14 | [471] Tereza Smitkova v Hailey Baptiste [202] | 4-6,2-6 | |
| ITF - W100 Bonita Springs | 05/12 23:35 | 25 | [201] Hailey Baptiste v Xinyu Wang [138] | 3-6,3-6 | |
| ITF - W100 Charleston | 05/05 14:00 | 25 | [211] Hailey Baptiste v Renata Zarazua [141] | 4-6,1-6 | |
| ITF - W60 Charlottesville | 04/30 18:00 | 27 | [145] Xinyu Wang v Hailey Baptiste [211] | 6-1,3-6,6-3 |
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.