Stadium: Court 3 Ground: Grass
| Challenger Indian Wells | 2018/02/28 18:00 | Peter Polansky v Stefan Kozlov | 6-2,6-4 |
| Challenger Indian Wells | 2018/02/27 19:30 | Stefan Kozlov v Mirza Basic | 7-5,6-4 |
| ATP Delray Beach Qual | 2018/02/17 18:50 | Stefan Kozlov v Ramkumar Ramanathan | 3-6,2-6 |
| Challenger Dallas | 2018/01/31 03:40 | Stefan Kozlov v Frances Tiafoe | 2-6,6-7 |
| Challenger Newport Beach | 2018/01/24 18:00 | Stefan Kozlov v Miomir Kecmanovic | 3-6,4-6 |
| Challenger Newport Beach | 2018/01/22 19:55 | Guilherme Clezar v Stefan Kozlov | 2-6,3-6 |
| Australian Open Qual | 2018/01/13 23:00 | Stefan Kozlov v Dustin Brown | 4-6,6-3,3-6 |
| Australian Open Qual | 2018/01/11 06:20 | Yannick Hanfmann v Stefan Kozlov | 6-4,6-7,4-6 |
| Australian Open Qual | 2018/01/12 04:00 | Matthias Bachinger v James Duckworth | 6-4,6-4 |
| Australian Open Qual | 2018/01/10 02:40 | Omar Jasika v James Duckworth | 2-6,4-6 |
| ATP Brisbane Qual | 2017/12/30 01:30 | Ernesto Escobedo v James Duckworth | 6-2,4-6,6-4 |
| Australian Open 2017 | 2017/01/16 05:10 | James Duckworth v Paolo Lorenzi | 4-6,6-7,7-6,4-6 |
| Challenger Toyota | 2016/11/20 03:00 | James Duckworth v Tatsuma Ito | 7-5,4-6,6-1 |
| Challenger Toyota | 2016/11/19 02:00 | James Duckworth v Daniel Masur | 6-3,7-6 |
| Challenger Toyota | 2016/11/18 03:55 | Yoshihito Nishioka v James Duckworth | 3-6,2-6 |
| Challenger Toyota | 2016/11/17 02:00 | Yuya Kibi v James Duckworth | 4-6,4-6 |