| 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 | |
| Australian Open Women | 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 Women | 08/23 15:00 | 14 | [85] Diana Shnaider v Hailey Baptiste [171] | 6-3,6-4 | |
| WTA Stanford | 08/14 20:50 | 25 | [170] Hailey Baptiste v Moyuka Uchijima [191] | 6-7,2-6 | |
| WTA Stanford | 08/13 19:35 | 19 | [174] Hailey Baptiste v Mai Hontama [184] | 6-3,2-6,2-6 | |
| WTA Stanford | 08/12 22:15 | 14 | Hailey Baptiste v Alexis Blokhina | 6-7,7-6,6-1 |
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.