| Ausztrál Open - nők | 01/12 04:40 | 15 | [118] Nina Stojanovic v Hailey Baptiste [168] | 3-6,4-6 | |
| Ausztrál Open - nők | 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 | |
| US Open - nők | 08/31 15:00 | 23 | [181] Hailey Baptiste v Shuai Zhang [49] | 3-6,4-6 | |
| WTA Chicago - selejtezők | 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 Berlin | 06/15 10:55 | 25 | [26] Jessica Pegula v Hailey Baptiste [166] | Retired | |
| WTA Berlin | 06/13 09:00 | 19 | [162] Priscilla Hon v Hailey Baptiste [203] | 3-6,5-7 | |
| WTA Berlin | 06/12 09:00 | 14 | [203] Hailey Baptiste v Jaqueline Cristian [152] | 6-3,6-1 | |
| French Open - nők | 06/03 09:00 | 24 | [5] Sofia Kenin v Hailey Baptiste [203] | 7-5,6-3 | |
| French Open - nők | 05/31 11:25 | 23 | [203] Hailey Baptiste v Anna Blinkova [77] | 6-1,6-4 | |
| French Open - nők | 05/28 08:30 | 19 | [194] Julia Grabher v Hailey Baptiste [202] | 6-3,5-7,3-6 | |
| French Open - nők | 05/26 16:25 | 15 | [202] Hailey Baptiste v Claire Liu [130] | 6-3,6-3 | |
| French Open - nők | 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 | |
| ITF W60 Charlottesville | 04/29 13:55 | 26 | [211] Hailey Baptiste v Maiar S A Abdelaziz [123] | 6-3,7-6 | |
| ITF W60 Charlottesville | 04/28 16:25 | 25 | [211] Hailey Baptiste v Jamie Loeb [267] | 6-2,6-2 | |
| WTA Charleston selejtezők | 04/10 15:00 | 14 | [216] Hailey Baptiste v Claire Liu [188] | Retired |
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.