| WTA Madrid | 04/24 18:20 | 23 | [110] Hailey Baptiste v Daria Saville [96] | 4-6,6-7 | |
| WTA Madrid | 04/23 15:20 | 15 | [116] Rebecca Sramkova v Hailey Baptiste [110] | 2-6,0-6 | |
| WTA Madrid | 04/22 17:25 | 14 | Ariana Geerlings v Hailey Baptiste | 6-2,1-6,2-6 | |
| WTA Bogota | 04/05 02:10 | 26 | [42] Marie Bouzková 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 Potosí | 03/27 18:00 | 26 | [183] Robin Montgomery v Hailey Baptiste [96] | 6-4,6-1 | |
| WTA San Luis Potosí | 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 |
Hailey Baptisteová (nepřechýleně Baptiste; * 3. listopadu 2001 Washington, D.C.) je americká profesionální tenistka. Ve své dosavadní kariéře na okruhu WTA Tour vyhrála jeden turnaj ve čtyřhře. V sérii WTA 125 vybojovala jednu deblovou trofej. V rámci okruhu ITF získala čtyři tituly ve dvouhře a čtyři ve čtyřhře.
Na žebříčku WTA byla ve dvouhře nejvýše klasifikována v březnu 2024 na 96. místě a ve čtyřhře v únoru téhož roku na 122. místě.
V juniorském tenise si zahrála finále čtyřhry US Open 2018, v němž s krajankou Dalaynou Hewittovou podlehly americkému páru Coco Gauffová a Caty McNallyová.