| 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 - Feminin | 01/12 02:00 | 19 | [172] Ella Seidel v Hailey Baptiste [131] | 6-0,6-4 | |
| Australian Open - Feminin | 01/11 04:05 | 15 | [150] Arianne Hartono v Hailey Baptiste [131] | 2-6,4-6 | |
| Australian Open - Feminin | 01/10 04:45 | 14 | [246] Seone Mendez v Hailey Baptiste [131] | 3-6,1-6 | |
| WTA - Brisbane | 01/02 12:45 | 24 | [129] Hailey Baptiste v Danielle Collins [54] | 1-6,6-4,3-6 | |
| WTA - Brisbane | 12/30 01:45 | 19 | [131] Hailey Baptiste v Sofya Lansere [201] | 6-3,7-5 | |
| WTA - Brisbane | 12/29 01:00 | 14 | [131] Hailey Baptiste v Gabriela Knutson [163] | 6-1,6-0 | |
| ITF - W100 Charleston | 11/11 16:00 | 28 | [38] Emma Navarro v Hailey Baptiste [131] | 6-2,6-1 | |
| ITF - W100 Charleston | 11/10 16:45 | 27 | [131] Hailey Baptiste v Elizabeth Mandlik [127] | 6-2,4-6,6-1 | |
| ITF - W100 Charleston | 11/09 17:15 | 26 | [131] Hailey Baptiste v Rasheeda McAdoo [261] | 6-2,2-6,6-4 | |
| ITF - W100 Charleston | 11/08 15:00 | 25 | [131] Hailey Baptiste v Maria Kozyreva [498] | 7-6,1-6,6-4 | |
| WTA - Midland | 11/03 18:00 | 27 | [115] Anna Kalinskaya v Hailey Baptiste [136] | 7-6,4-6,7-6 | |
| WTA - Midland | 11/01 23:00 | 26 | [136] Hailey Baptiste v Peyton Stearns [48] | 6-2,6-7,6-2 | |
| WTA - Midland | 10/31 17:55 | 25 | [366] Victoria Hu v Hailey Baptiste [136] | 5-7,5-7 | |
| WTA - Tampico | 10/27 00:45 | 26 | [108] Katie Volynets v Hailey Baptiste [136] | 6-7,6-3,6-1 | |
| WTA - Tampico | 10/24 01:00 | 25 | [444] Katrina Scott v Hailey Baptiste [136] | 1-6,7-6,4-6 | |
| ITF - W80 Macon | 10/19 13:50 | 26 | [134] Hailey Baptiste v Raluca Georgiana Serban [170] | 7-6,6-7,4-6 | |
| ITF - W80 Macon | 10/17 20:20 | 25 | [134] Hailey Baptiste v Louisa Chirico [256] | 6-0,6-2 | |
| ITF - W60 Rome, GA | 10/04 14:00 | 25 | Victoria Hu v Hailey Baptiste | Cancelled | |
| ITF - W60 Templeton | 09/28 21:05 | 26 | [310] McCartney Kessler v Hailey Baptiste [137] | 3-6,6-3,6-1 | |
| ITF - W60 Templeton | 09/28 01:00 | 25 | [368] Veronika Miroshnichenko v Hailey Baptiste [137] | 6-7,6-1,4-6 | |
| WTA - Guadalajara | 09/20 17:00 | 26 | [174] Hailey Baptiste v Caroline Garcia [11] | 5-7,4-6 | |
| WTA - Guadalajara | 09/18 18:30 | 25 | [36] Karolina Pliskova v Hailey Baptiste [174] | 6-7,7-5,6-7 | |
| WTA - Guadalajara | 09/17 18:50 | 24 | Hailey Baptiste v Lya I F Olivares | 6-2,6-1 | |
| WTA - San Diego | 09/10 22:20 | 19 | [77] Magdalena Frech v Hailey Baptiste [171] | 6-4,6-7,6-4 | |
| WTA - San Diego | 09/10 02:25 | 14 | [393] Victoria Hu v Hailey Baptiste [171] | 4-6,0-6 | |
| US Open - Feminin | 08/23 15:00 | 14 | [85] Diana Shnaider v Hailey Baptiste [171] | 6-3,6-4 |
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.