Stadium: Clay 6 Round: 25 Ground: Clay
| ATP Sydney Qual | 2018/01/06 00:50 | Christopher O'Connell v Nicolas Mahut | 6-2,4-6,4-6 |
| Challenger Playford Qual | 2018/01/01 01:00 | Christopher O'Connell v Marinko Matosevic | 4-6,0-6 |
| Challenger Playford Qual | 2017/12/31 00:30 | Brydan Klein v Christopher O'Connell | 6-3,6-7,2-6 |
| Challenger Playford Qual | 2017/12/29 23:30 | Christopher O'Connell v Mislav Bosnjak | 7-6,6-1 |
| Australian Open WC | 2017/12/13 03:00 | Omar Jasika v Christopher O'Connell | 7-6,3-6,6-1,4-6,6-4 |
| Australian Open WC | 2017/12/11 02:00 | Blake Ellis v Christopher O'Connell | 7-6,4-6,3-6,4-6 |
| Challenger Canberra 2 | 2017/10/31 02:20 | Christopher O'Connell v Andrew Harris | 3-6,6-7 |
| Challenger Canberra 2 Qual | 2017/10/29 00:30 | Christopher O'Connell v Gavin Van Peperzeel | 7-6,6-7,6-7 |
| ITF Spain F9 | 2018/04/17 09:50 | Miguel Semmler v Nikolas Sanchez Izquierdo | 6-4,7-6 |
| ITF Spain F9 Qual | 2018/04/16 10:25 | Nikolas Sanchez Izquierdo v Louis Chaix | 6-2,6-1 |
| ITF Spain F9 Qual | 2018/04/15 10:30 | Ryan Nijboer v Nikolas Sanchez Izquierdo | 3-6,3-6 |
| ITF Spain F9 Qual | 2018/04/14 12:15 | Alejandro Moro Canas v Nikolas Sanchez Izquierdo | 4-6,0-6 |
| ITF Tunisia F12 | 2018/03/26 11:30 | Nikolas Sanchez Izquierdo v Alex M Pujolras | 6-1,4-6,6-7 |
| ITF Spain F7 | 2018/03/19 09:30 | Aaron Cortes Alcaraz v Nikolas Sanchez Izquierdo | 6-2,6-1 |
| ITF Tunisia F10 | 2018/03/15 08:30 | Eduardo Agustin Torre v Nikolas Sanchez Izquierdo | 7-6,6-3 |
| ITF Tunisia F10 | 2018/03/13 09:40 | Nikolas Sanchez Izquierdo v Edoardo Lamberti | 6-0,6-4 |