Stadium: Cancha 4 Round: 25 Ground: Clay
| ITF Spain F5 | 2017/02/17 13:00 | Roberto Ortega-Olmedo v Pedro Sakamoto | 6-3,6-2 |
| Challenger Buenos Aires | 2018/11/11 20:15 | Pedro Sakamoto v Gonzalo Villanueva | 5-7,6-4,2-6 |
| Challenger Buenos Aires | 2018/11/11 16:10 | Pedro Sakamoto v Tomas Farjat | 6-3,6-3 |
| Challenger Montevideo | 2018/11/03 13:00 | Pedro Sakamoto v Genaro Alberto Olivieri | 2-6,0-6 |
| Challenger Guayaquil Qual | 2018/10/27 16:00 | Pedro Sakamoto v Federico Zeballos | 6-1,6-7,2-6 |
| Challenger Lima | 2018/10/20 21:20 | Tomas Barrios Vera v Pedro Sakamoto | 6-4,6-3 |
| Challenger Campinas | 2018/09/30 13:00 | Nicolas Alvarez v Pedro Sakamoto | 6-3,7-6 |
| Challenger Campinas | 2018/09/29 13:55 | Guillermo Duran v Pedro Sakamoto | 1-6,2-6 |
| ITF Poland F8 | 2018/08/23 09:00 | Pedro Sakamoto v Petr Nouza | 3-6,3-6 |
| ITF USA F33 | 2018/11/24 15:00 | Jack Findel-Hawkins v Roberto Ortega-Olmedo | 6-3,2-6,2-6 |
| ITF USA F33 | 2018/11/23 17:30 | Maxime Cressy v Roberto Ortega-Olmedo | 6-7,6-7 |
| ITF USA F33 | 2018/11/21 17:00 | John McNally v Roberto Ortega-Olmedo | 1-6,2-6 |
| ITF USA F33 | 2018/11/20 21:45 | Jacob Dunbar v Roberto Ortega-Olmedo | 2-6,2-6 |
| Challenger Houston | 2018/11/15 16:00 | Kamil Majchrzak v Roberto Ortega-Olmedo | 6-3,4-6,6-3 |
| Challenger Houston | 2018/11/13 22:55 | Sumit Sarkar v Roberto Ortega-Olmedo | 6-7,1-6 |
| Challenger Las Vegas | 2018/10/25 19:20 | Roberto Ortega-Olmedo v Jason Jung | 4-6,4-6 |
| Challenger Las Vegas | 2018/10/23 22:45 | Jan Choinski v Roberto Ortega-Olmedo | 3-6,4-6 |