| WTA Guadalajara | 09/15 16:00 | 14 | [180] Elvina Kalieva v Alexa Guarachi [67] | 7-5,7-6 | |
| WTA Charleston | 04/03 19:40 | 14 | [158] Whitney Osuigwe v Alexa Guarachi [15] | 6-3,3-6,6-2 | |
| WTA Nanchang | 09/07 10:55 | 45 | [286] Urszula Radwanska v Alexa Guarachi [86] | 7-6,6-2 | |
| ITF W100 Vancouver | 08/12 17:00 | 45 | [83] Alexa Guarachi v Catherine Harrison [327] | 6-7,6-7 | |
| ITF W80 Dothan | 04/17 21:10 | 25 | [275] Renata Zarazua v Alexa Guarachi [414] | 7-5,6-2 | |
| WTA Bogota Qual | 04/06 15:50 | 45 | Bibiane Schoofs v Alexa Guarachi | 6-1,6-0 | |
| WTA Monterrey | 03/31 19:20 | 46 | [262] Kristina Kucova v Alexa Guarachi [393] | 6-1,6-0 | |
| WTA Monterrey | 03/30 16:00 | 45 | Alexa Guarachi v Romary Cardenas Rifka | 6-1,6-0 | |
| WTA Guadalajara | 03/09 18:50 | 45 | [195] Xiyu Wang v Alexa Guarachi [394] | 6-4,5-7,6-4 | |
| 2019 Fed Cup | 02/09 15:00 | 29 | [478] Maria Jose P Ramirez v Alexa Guarachi [394] | 3-6,5-7 | |
| WTA Newport Beach | 01/21 18:00 | 25 | [388] Alexa Guarachi v Katie Volynets [471] | 6-4,4-6,3-6 | |
| WTA Auckland | 12/28 21:00 | 45 | [184] Ellen Perez v Alexa Guarachi [424] | 6-2,6-4 | |
| WTA Houston | 11/10 21:50 | 45 | [479] Alexa Guarachi v Reka-Luca Jani [311] | 6-4,0-6,0-6 | |
| ITF Women Colina | 11/08 23:00 | 27 | [479] Alexa Guarachi v Paula Ormaechea [264] | 4-6,1-6 | |
| ITF Women Colina | 11/07 23:00 | 26 | [399] Francesca Jones v Alexa Guarachi [479] | 4-6,7-5,2-6 | |
| ITF Women Colina | 11/05 15:35 | 25 | [499] Eduarda Piai v Alexa Guarachi [479] | 4-6,1-6 | |
| ITF Women Macon | 10/24 14:00 | 25 | [149] Marie Bouzkova v Alexa Guarachi [473] | 7-5,6-2 | |
| WTA Chicago | 09/02 15:00 | 45 | [422] Alexa Guarachi v Tereza Martincova [228] | 4-6,0-6 | |
| ITF Women Vancouver Qual | 08/12 21:30 | 54 | [227] Misaki Doi v Alexa Guarachi [407] | 6-1,7-6 | |
| WTA Washington Qual | 07/29 20:35 | 164 | [167] Harriet Dart v Alexa Guarachi [379] | 6-2,6-2 | |
| WTA Washington Qual | 07/28 17:25 | 64 | [379] Alexa Guarachi v Francesca Di Lorenzo [194] | 2-6,7-5,7-5 | |
| WTA Gstaad Qual | 07/15 09:00 | 64 | [159] Conny Perrin v Alexa Guarachi [406] | 6-4,6-0 | |
| WTA Gstaad Qual | 07/14 08:00 | 45 | [406] Alexa Guarachi v Julia Grabher [226] | 4-6,6-1,6-1 | |
| ITF Women Contrexeville Qual | 07/09 11:55 | 54 | [440] Anastasiya Vasylyeva v Alexa Guarachi [406] | 6-7,6-3,6-3 | |
| ITF Women Contrexeville Qual | 07/08 11:05 | 54 | Esther Thebault v Alexa Guarachi | 0-6,2-6 | |
| ITF Women Ilkley Qual | 06/17 10:00 | 54 | [174] Bibiane Schoofs v Alexa Guarachi [402] | 6-4,1-6,6-3 | |
| ITF Women Charleston Qual | 05/01 14:00 | 54 | [276] Camilla Rosatello v Alexa Guarachi [403] | 6-4,4-6,6-4 | |
| ITF Women Charleston Qual | 04/30 15:45 | 54 | Jada Robinson v Alexa Guarachi | 4-6,2-6 | |
| ITF Women Charleston Qual | 04/29 18:40 | 54 | [399] Ashley Weinhold v Alexa Guarachi [405] | 1-6,4-6 | |
| ITF Women Charlottesville Qual | 04/22 19:25 | 54 | [489] Whitney Osuigwe v Alexa Guarachi [405] | 6-4,6-1 |