Round: 60 Ground: Hardcourt outdoor
| ITF Germany F9 | 2018/07/23 10:00 | Louroi Martinez v Tim Sandkaulen | 6-0,3-6,6-3 |
| ITF Germany F9 | 2018/07/22 11:00 | Tim Sandkaulen v Torben Steinorth | 6-4,6-1 |
| ITF Germany F9 | 2018/07/22 08:00 | Tim Sandkaulen v Lodewijk Weststrate | 6-2,7-6 |
| Challenger Meerbusch Qual | 2017/08/12 12:10 | Antonio Sancic v Tim Sandkaulen | 7-6,6-1 |
| ITF Netherlands F4 | 2017/07/11 08:00 | Tom Farquharson v Tim Sandkaulen | 6-2,6-2 |
| ITF Netherlands F4 | 2017/07/09 08:00 | Tim Sandkaulen v Joris Bodin | 6-2,6-1 |
| ITF Netherlands F4 | 2017/07/08 10:30 | Kody Pearson v Tim Sandkaulen | 4-6,2-6 |
| ITF Netherlands F4 | 2017/07/08 08:00 | Ilco Van Buuren v Tim Sandkaulen | 6-2,6-7,2-6 |
| ITF USA F15 Qual | 2018/06/16 15:30 | Robert Kelly v Kyle Johnson | 6-1,6-3 |
| ITF USA F13 Qual | 2018/06/10 14:00 | Trevor A Johnson v Robert Kelly | 6-1,6-1 |
| ITF USA F13 Qual | 2018/06/09 13:00 | Morgan Dill v Robert Kelly | 2-6,1-6 |
| Challenger Cary Qual | 2017/09/09 19:55 | Robert Kelly v Ezekiel Clark | 4-6,6-4,3-6 |
| Challenger Cary Qual | 2016/09/12 18:25 | James McGee v Robert Kelly | 6-1,6-1 |
| Challenger Cary Qual | 2016/09/11 17:25 | Robert Kelly v Alexis Galarneau | 7-6,6-1 |
| Challenger Cary Qual | 2016/09/10 18:55 | Ivan Saveljic v Robert Kelly | 1-6,1-6 |