Stadium: Court 6 Round: 62 Ground: Clay
| ITF USA F13 Qual | 2018/06/10 14:00 | Drew Van Orderlain v Chang, Jonathan | 7-5,6-2 |
| Irving, USA, Qualifying | 2018/03/12 17:30 | Arthur Rinderknech v Chang, Jonathan | 6-1,6-4 |
| ITF Canada F2 Qual | 2018/03/04 15:00 | Baughman, Deiton v Chang, Jonathan | 6-1,6-1 |
| ITF Canada F2 Qual | 2018/03/03 15:00 | Chang, Jonathan v Zlobinsky, Julian | 6-4,3-6,3-6 |
| ITF Canada F1 | 2018/03/01 00:00 | Chang, Jonathan v Dancevic, Frank | 2-6,6-7 |
| ITF Canada F1 Qual | 2018/02/26 15:00 | Verbeek, Sem v Chang, Jonathan | 5-7,6-3,4-6 |
| ITF Canada F1 Qual | 2018/02/25 15:00 | Emmett Ward v Chang, Jonathan | 2-6,4-6 |
| ITF Germany F3 Qual | 2018/01/28 13:00 | Walterscheid-Tukic, Nikolas v Chang, Jonathan | 6-7,6-4,7-6 |
| ITF USA F13 Qual | 2018/06/11 17:00 | Stalder, Reese v Aleksandar Kovacevic | 6-7,6-3,3-6 |
| ITF USA F13 Qual | 2018/06/10 14:00 | Harrison Adams v Stalder, Reese | 6-7,1-6 |
| ITF USA F13 Qual | 2018/06/09 15:30 | Woog, Jarryd v Stalder, Reese | 2-6,4-6 |
| ITF USA F2 Qual | 2018/01/06 21:00 | Lebedev, Alexander v Stalder, Reese | 7-6,6-3 |
| ITF USA F1 Qual | 2017/12/31 18:00 | Smith, Logan v Stalder, Reese | 6-1,6-2 |
| ITF USA F1 Qual | 2017/12/30 20:30 | Stalder, Reese v Teraz, Grega | 7-6,6-1 |
| ITF USA F39 Qual | 2017/11/26 15:00 | Ezekiel Clark v Stalder, Reese | 4-6,6-1,6-3 |
| ITF USA F39 Qual | 2017/11/25 16:00 | Bryde, Trent v Stalder, Reese | 0-6,6-2,2-6 |