Stadium: Court 1 Round: 54
| Challenger Busan Qual | 2018/05/13 02:00 | Rubin Statham v Lee, Tae-Woo | 7-6,6-3 |
| Challenger Busan Qual | 2018/05/12 02:50 | Rubin Statham v Seo, Min Gyo | 6-1,6-0 |
| Challenger Gimcheon | 2018/05/08 02:00 | Rubin Statham v Soeda, Go | 2-6,6-3,4-6 |
| Puerto Vallarta, Mexico | 2018/04/30 20:25 | Rubin Statham v Hernandez-Fernandez, Jose | 2-6,4-6 |
| Challenger Leon | 2018/04/25 18:00 | Rubin Statham v Quiroz, Roberto | 6-3,6-7,2-6 |
| Challenger Leon | 2018/04/24 15:00 | Arevalo-Gonzalez, Marcelo v Rubin Statham | 5-7,6-4,2-6 |
| Challenger Leon Qual | 2018/04/23 16:00 | Rubin Statham v Simon, Tobias | 7-6,6-3 |
| Challenger Leon Qual | 2018/04/22 17:30 | Rubin Statham v Franco Agamenone | 7-6,6-2 |
| Challenger Busan Qual | 2018/05/13 02:00 | Thomas Fancutt v Olaso, Guillermo | 1-6,5-7 |
| Challenger Busan Qual | 2018/05/12 01:00 | Jae Hwan Kim v Olaso, Guillermo | 0-6,5-7 |
| Challenger - Glasgow | 2018/05/04 09:30 | Lacko, Lukas v Olaso, Guillermo | 6-2,6-3 |
| Challenger - Glasgow | 2018/05/02 13:50 | Olaso, Guillermo v Glasspool, Lloyd | 6-4,6-3 |
| Challenger - Glasgow | 2018/04/30 11:15 | Evgeny Karlovskiy v Olaso, Guillermo | 6-7,3-6 |
| ITF Spain F9 | 2018/04/19 14:00 | Olaso, Guillermo v Steven Diez | 7-6,1-6,5-7 |
| ITF Spain F9 | 2018/04/17 09:25 | Olaso, Guillermo v Bossel, Adrien | 6-2,6-4 |
| Challenger Alicante Qual | 2018/03/31 09:55 | Gomez-Herrera, Carlos v Olaso, Guillermo | 2-6,7-6,7-5 |