Stadium: Court 1 Round: 44 Ground: Hardcourt indoor
| ITF Canada F1 Qual | 2018/02/25 15:00 | Verbeek, Sem v Pare, Francis | 6-2,6-4 |
| San Francisco, USA, Qualifying | 2018/02/05 00:30 | Gonzalez, Maximo v Verbeek, Sem | 6-3,6-2 |
| ITF Dominican Republic F3 | 2017/12/14 14:00 | Verbeek, Sem v Gomez, Alejandro | 6-2,6-7,4-6 |
| ITF Dominican Republic F3 | 2017/12/13 13:30 | Quiroz, Roberto v Verbeek, Sem | 7-6,6-7,3-6 |
| ITF Dominican Republic F3 | 2017/12/11 14:30 | Verbeek, Sem v Evan Zhu | 6-2,7-6 |
| ITF Dominican Republic F2 | 2017/12/08 13:30 | Verbeek, Sem v Emilio Gomez | 3-6,2-6 |
| ITF Dominican Republic F2 | 2017/12/07 13:30 | Botezan, George v Verbeek, Sem | 0-6,2-6 |
| ITF Dominican Republic F2 | 2017/12/05 15:05 | Verbeek, Sem v Vidal Azorin, Jose Fco | 6-7,6-2,6-1 |
| 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 Germany F2 Qual | 2018/01/21 13:00 | Heger, Tim v Chang, Jonathan | 7-6,6-4 |
| ITF Germany F1 | 2018/01/08 09:00 | Chang, Jonathan v Aichhorn, Jakob | 2-6,3-6 |
| ITF Dominican Republic F1 | 2017/11/27 13:00 | Chang, Jonathan v Greif, Lukas | 6-3,4-6,0-6 |
| ITF USA F37 | 2017/11/17 18:15 | Chang, Jonathan v Nuno Borges | 2-6,2-6 |
| ITF USA F37 | 2017/11/16 16:00 | Harrison Adams v Chang, Jonathan | 0-6,3-6 |
| ITF USA F37 | 2017/11/14 17:50 | Nick Chappell v Chang, Jonathan | 6-3,4-6,3-6 |