Stadium: Court 10 Round: 24 Ground: Hardcourt outdoor
| Challenger Noumea | 2018/12/31 01:50 | Tomas Barrios Vera v Guilherme Clezar | 4-6,6-2,6-3 |
| Challenger Buenos Aires | 2018/11/16 18:10 | Guilherme Clezar v Federico Coria | 6-7,5-7 |
| Challenger Buenos Aires | 2018/11/15 17:00 | Martin Cuevas v Guilherme Clezar | 4-6,1-6 |
| Challenger Buenos Aires | 2018/11/12 16:05 | Miljan Zekic v Guilherme Clezar | 3-6,2-6 |
| Challenger Montevideo | 2018/11/06 19:45 | Guilherme Clezar v Pedro Sousa | 1-6,2-6 |
| Challenger Guayaquil | 2018/10/30 15:30 | Facundo Arguello v Guilherme Clezar | 4-6,6-2,6-1 |
| Challenger Lima | 2018/10/24 16:00 | Guilherme Clezar v Cristian Garin | 3-6,3-6 |
| Challenger Lima | 2018/10/22 17:55 | Guilherme Clezar v Kento Tagashira | 6-0,6-0 |
| Challenger Playford | 2018/12/31 02:45 | Sadio Doumbia v Max Purcell | 1-6,6-4,6-4 |
| Australian Open WC | 2018/12/09 23:00 | Max Purcell v Dayne Kelly | 6-4,1-6,4-6,3-6 |
| Challenger Pune | 2018/11/21 09:05 | Max Purcell v Sebastian Fanselow | 2-6,1-6 |
| Challenger Pune | 2018/11/19 11:50 | James Ward v Max Purcell | 4-6,4-6 |
| Challenger Bangalore | 2018/11/13 05:30 | Max Purcell v Brayden Schnur | 4-6,6-7 |
| Challenger Canberra 2 | 2018/11/01 01:20 | Nicola Kuhn v Max Purcell | 6-2,6-4 |
| Challenger Canberra 2 | 2018/10/30 01:20 | Max Purcell v Alex Bolt | 6-1,6-7,6-4 |
| Challenger Traralgon | 2018/10/22 23:00 | Max Purcell v Marc Polmans | 3-6,6-7 |