Stadium: Court 3 Round: 28
| Challenger - Buenos Aires - Kwal. | 2017/10/07 16:05 | Oscar Jose Gutierrez v Lenny Hampel | 2-6,6-3,1-6 |
| ITF Hungary F4 | 2018/06/15 08:00 | Peter Nagy v Oscar Jose Gutierrez | 7-5,4-6,1-6 |
| ITF Hungary F4 | 2018/06/14 09:30 | Vlad Andrei Dancu v Oscar Jose Gutierrez | 2-6,3-6 |
| ITF Hungary F4 | 2018/06/12 08:00 | Ljubomir Celebic v Oscar Jose Gutierrez | 2-6,6-4,3-6 |
| ITF Argentina F3 | 2018/05/30 13:00 | Tomas Martin Etcheverry v Oscar Jose Gutierrez | 7-6,6-2 |
| ITF Argentina F2 | 2018/05/25 13:00 | Juan Carlos Saez v Oscar Jose Gutierrez | 6-4,4-6,6-4 |
| ITF Argentina F2 | 2018/05/24 14:00 | Eduardo Agustin Torre v Oscar Jose Gutierrez | 4-6,1-6 |
| ITF Argentina F2 | 2018/05/23 13:00 | Felipe Derdoy v Oscar Jose Gutierrez | 0-6,0-6 |
| ITF Argentina F2 | 2018/05/22 13:00 | Mateo Nicolas Martinez v Oscar Jose Gutierrez | 6-4,4-6,2-6 |
| ITF Hungary F4 | 2018/06/13 08:00 | Fabian Marozsan v Lenny Hampel | 6-7,4-6 |
| ITF Hungary F4 | 2018/06/11 11:20 | Olexiy Kolisnyk v Lenny Hampel | 6-4,4-6,4-6 |
| Challenger Poznan Qual | 2018/06/03 08:00 | Lenny Hampel v Maciej Rajski | 6-7,4-6 |
| ITF Italy F11 | 2018/05/25 10:20 | Lenny Hampel v Pietro Rondoni | 1-6,2-6 |
| ITF Italy F11 | 2018/05/23 09:00 | Lenny Hampel v Alessandro Cortegiani | 6-2,6-3 |
| ITF Italy F9 | 2018/04/23 13:30 | Lenny Hampel v Billy Harris | 6-7,7-6,2-6 |
| ITF Italy F8 | 2018/04/19 12:30 | Andrea Collarini v Lenny Hampel | 6-4,6-2 |
| ITF Italy F8 | 2018/04/18 12:00 | Lenny Hampel v Billy Harris | 5-7,6-1,6-3 |