Results
| ITF M25 Uberlingen | 08/19 08:00 | - | Guillermo Tunas v Numa Lemieux-Monette | 2-6,3-6 | |
| ITF M25 Uriage | 07/14 11:30 | - | Jack McGary v Guillermo Tunas | View | |
| ITF M15 Casablanca Qual | 06/22 13:30 | - | Hamza El Amine v Guillermo Tunas | View | |
| ITF M25 Villeneuve-Loubet | 06/08 14:22 | - | Alexandre Reco v Guillermo Tunas | 6-0,5-1 | |
| ITF M25 Xalapa | 05/13 20:00 | - |
Govind Nanda
v
Guillermo Tunas |
6-2,6-1 | |
| ITF M15 Villahermosa | 05/08 20:00 | - | Guillermo Tunas v Felix Corwin | 0-6,0-6 | |
| Challenger San Luis Potosi | 04/13 18:50 | 14 | Felix Corwin v Guillermo Tunas | 6-2,6-4 | |
| Challenger Mexico City | 04/06 21:30 | 14 | Pedro Sakamoto v Guillermo Tunas | 6-1,6-2 | |
| Challenger Morelia | 03/23 18:15 | 14 |
Viktor Durasovic
v
Guillermo Tunas |
6-1,6-1 | |
| Challenger Merida | 03/16 17:00 | 14 |
Evan Zhu
v
Guillermo Tunas |
6-2,6-1 | |
| ITF M15 Huamantla | 03/11 17:30 | - | Guillermo Tunas v Alberto Odiseo Alvarado Berrospi | 2-6,3-6 | |
| ITF M15 Guatemala | 11/11 16:00 | 54 | Enzo Crevelaro v Guillermo Tunas | 6-3,6-4 |
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