Stadium: Court Morault Round: 24 Ground: Hardcourt outdoor
| Challenger Montevideo | 2018/11/07 18:40 | Pedro Cachin v Lorenzo Giustino | 1-6,3-6 |
| Challenger Montevideo | 2018/11/05 17:00 | Lorenzo Giustino v Thomaz Bellucci | 6-3,6-3 |
| Challenger Guayaquil | 2018/10/29 18:00 | Juan Ignacio Londero v Lorenzo Giustino | 6-2,6-4 |
| Challenger Barcelona | 2018/10/12 09:30 | Pedro Martinez v Lorenzo Giustino | 6-2,7-5 |
| Challenger Barcelona | 2018/10/11 09:30 | Lorenzo Giustino v Nicola Kuhn | 6-4,4-6,6-1 |
| Challenger Barcelona | 2018/10/10 10:00 | Jordi Samper-Montana v Lorenzo Giustino | 4-6,4-6 |
| Challenger Florence | 2018/10/05 13:45 | Pablo Andujar v Lorenzo Giustino | 6-4,6-7,6-3 |
| Challenger Florence | 2018/10/04 08:30 | Kevin Krawietz v Lorenzo Giustino | 2-6,4-6 |
| Challenger Houston | 2018/11/16 17:50 | Thai-Son Kwiatkowski v Roy Smith | 6-4,6-7,6-7 |
| Challenger Houston | 2018/11/14 18:10 | Paolo Lorenzi v Thai-Son Kwiatkowski | 4-6,4-6 |
| Challenger Houston | 2018/11/13 19:30 | Thai-Son Kwiatkowski v Mitchell Krueger | 7-6,4-6,6-4 |
| Challenger Charlottesville | 2018/11/03 17:00 | Peter Polansky v Thai-Son Kwiatkowski | 6-2,7-6 |
| Challenger Charlottesville | 2018/11/02 18:25 | Thai-Son Kwiatkowski v Michael Mmoh | 3-6,6-3,6-4 |
| Challenger Charlottesville | 2018/11/01 19:30 | Tim Smyczek v Thai-Son Kwiatkowski | 2-6,7-5,2-6 |
| Challenger Las Vegas | 2018/10/24 19:40 | Blaz Rola v Thai-Son Kwiatkowski | 6-3,6-4 |
| Challenger Las Vegas | 2018/10/23 19:35 | Thai-Son Kwiatkowski v Evan Song | 6-4,6-4 |