Stadium: Cancha 8 Round: 19 Ground: Clay
| ITF M15 Monastir | 2020/10/20 08:00 | Guido Ivan Justo v Martin Cuevas | 2-6,6-4,7-5 |
| ITF M15 Buenos Aires | 2019/09/20 17:20 | Martin Cuevas v Guido Ivan Justo | 5-7,5-7 |
| Challenger Prague | 2021/08/22 08:00 | Martin Cuevas v Zsombor Piros | 6-2,3-6,5-7 |
| Challenger Cordenons | 2021/08/01 09:30 | Giulio Zeppieri v Martin Cuevas | 6-3,6-1 |
| Challenger Lyon | 2021/06/06 11:10 | Pedro Cachin v Martin Cuevas | 6-4,7-6 |
| ITF M25 Vic | 2021/05/19 15:00 | Carlos Gimeno Valero v Martin Cuevas | 6-3,3-6,6-2 |
| ITF M15 Valldoreix | 2021/05/16 09:00 | Alvaro Lopez San Martin v Martin Cuevas | 2-6,6-1,6-4 |
| ITF M15 Valldoreix | 2021/05/15 09:00 | Tiago Cacao v Martin Cuevas | 6-3,6-7,4-6 |
| ITF M15 Valldoreix | 2021/05/14 08:00 | Martin Cuevas v Louis Dussin | 4-6,6-2,6-4 |
| ITF M15 Valldoreix | 2021/05/13 09:30 | Martin Cuevas v Ivan Gakhov | 6-2,5-7,6-3 |
| ITF M15 Monastir | 2021/05/18 08:30 | Thomas Fancutt v Guido Ivan Justo | 6-2,6-4 |
| ITF M15 Monastir | 2021/05/10 08:00 | Guido Ivan Justo v Francois Musitelli | 6-3,4-6,5-10 |
| ITF M15 Monastir | 2021/05/05 08:25 | Guido Ivan Justo v Takashi Saito | 1-6,1-6 |
| ITF M15 Monastir | 2021/04/28 08:30 | Yuta Kawahashi v Guido Ivan Justo | 6-4,6-2 |
| ITF M15 Cordoba | 2021/04/06 14:05 | Tomas Farjat v Guido Ivan Justo | 6-2,6-4 |
| ATP Acapulco | 2021/03/14 04:35 | Guido Ivan Justo v Agustin Velotti | 0-6,1-6 |
| ATP Cordoba | 2021/02/20 19:50 | Joao Menezes v Guido Ivan Justo | 6-3,7-6 |
| Challenger Concepcion | 2021/02/14 16:00 | Guido Ivan Justo v Mariano Kestelboim | 3-6,6-4,3-6 |