| WTA Bogota | 04/05 02:10 | 26 | [42] Marie Bouzkova v Hailey Baptiste [96] | 6-3,6-4 | |
| WTA Bogota | 04/02 18:50 | 25 | [127] Tamara Zidansek v Hailey Baptiste [96] | 2-6,6-4,3-6 | |
| WTA San Luis Potosi | 03/27 18:00 | 26 | [183] Robin Montgomery v Hailey Baptiste [96] | 6-4,6-1 | |
| WTA San Luis Potosi | 03/25 21:55 | 25 | Maria Fernanda Navarro v Hailey Baptiste | 4-6,1-6 | |
| WTA Miami | 03/19 15:00 | 23 | [43] Xinyu Wang v Hailey Baptiste [96] | 7-6,6-3 | |
| WTA Indian Wells | 03/09 04:30 | 24 | [20] Madison Keys v Hailey Baptiste [105] | 6-4,4-6,7-6 | |
| WTA Indian Wells | 03/07 21:50 | 23 | [199] Robin Montgomery v Hailey Baptiste [105] | 2-6,6-4,1-6 | |
| WTA Indian Wells | 03/05 22:00 | 15 | [93] Clara Tauson v Hailey Baptiste [105] | 6-7,6-7 | |
| WTA Indian Wells | 03/04 21:15 | 14 | [135] Daria Snigur v Hailey Baptiste [105] | 2-6,3-6 | |
| WTA Indian Wells | 03/04 20:40 | 14 | Sara Bejlek v Hailey Baptiste | Cancelled | |
| WTA Puerto Vallarta | 02/25 01:35 | 28 | [114] Hailey Baptiste v McCartney Kessler [153] | 4-6,4-6 | |
| WTA Puerto Vallarta | 02/24 02:45 | 27 | [114] Hailey Baptiste v Robin Montgomery [207] | 4-6,6-1,6-2 | |
| WTA Puerto Vallarta | 02/22 02:30 | 26 | [114] Hailey Baptiste v Iryna Shymanovich [204] | 6-0,6-1 | |
| WTA Puerto Vallarta | 02/20 18:00 | 25 | [114] Hailey Baptiste v Martina Capurro Taborda [155] | 6-1,6-3 | |
| ITF W50 Morelia | 02/17 21:05 | 29 | [115] Hailey Baptiste v Jessica Bouzas Maneiro [144] | 7-6,1-6,6-7 | |
| ITF W50 Morelia | 02/17 16:30 | 28 | [115] Hailey Baptiste v Rebecca Marino [146] | 7-5,6-1 | |
| ITF W50 Morelia | 02/16 01:30 | 27 | [115] Hailey Baptiste v Natalija Stevanovic [190] | 4-6,6-4,6-3 | |
| ITF W50 Morelia | 02/14 18:30 | 26 | [115] Hailey Baptiste v Jessica Failla [436] | 6-3,2-6,6-4 | |
| ITF W50 Morelia | 02/13 19:00 | 25 | Hailey Baptiste v Maria Jose Portillo Ramirez | 6-1,6-0 | |
| ITF W100 Irapuato | 02/07 19:00 | 25 | [214] Iryna Shymanovich v Hailey Baptiste [114] | 6-4,6-3 | |
| ITF W75 Rome (GA) | 02/03 18:20 | 28 | [177] McCartney Kessler v Hailey Baptiste [121] | 2-6,6-3,6-3 | |
| ITF W75 Rome (GA) | 02/02 18:40 | 27 | [328] Victoria Hu v Hailey Baptiste [121] | 1-6,3-6 | |
| ITF W75 Rome (GA) | 02/01 17:15 | 26 | [384] Sophie Chang v Hailey Baptiste [121] | 6-7,3-6 | |
| ITF W75 Rome (GA) | 01/31 19:20 | 25 | Sara Daavettila v Hailey Baptiste | 2-6,3-6 | |
| ITF W75 Vero Beach | 01/27 15:50 | 28 | [389] Gabriela Lee v Hailey Baptiste [130] | 6-3,6-2 | |
| ITF W75 Vero Beach | 01/26 17:00 | 27 | [130] Hailey Baptiste v Yulia Starodubtseva [150] | 7-5,6-2 | |
| ITF W75 Vero Beach | 01/25 16:00 | 26 | [130] Hailey Baptiste v Vivian Wolff [399] | 6-4,4-6,6-4 | |
| ITF W75 Vero Beach | 01/24 19:45 | 25 | Hailey Baptiste v Irina Ramialison | 6-2,6-1 | |
| Australian Open Women | 01/12 02:00 | 19 | [172] Ella Seidel v Hailey Baptiste [131] | 6-0,6-4 | |
| Australian Open Women | 01/11 04:05 | 15 | [150] Arianne Hartono v Hailey Baptiste [131] | 2-6,4-6 |
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.