Stadium: Hard Court 5 Round: 44 Ground: Hardcourt outdoor
| ITF - M15 Héraklion | 2020/10/25 07:30 | O'Neill, Daniel v Krstanovic, Josip | 0-6,3-6 |
| ITF M15 Cancun | 2019/12/08 17:00 | Eguez, Sebastian v O'Neill, Daniel | 6-1,6-1 |
| ITF M15 Cancun | 2019/12/01 19:00 | Rodrigues, Pedro Gabriel v O'Neill, Daniel | 6-2,6-4 |
| ITF M15 Cancun | 2019/11/17 18:00 | Wally Thayne v O'Neill, Daniel | 6-1,7-5 |
| ITF Ireland F1 Qual | 2018/07/30 12:25 | Mckeown, Jordan v O'Neill, Daniel | 6-0,7-6 |
| ITF Ireland F1 Qual | 2017/07/16 13:00 | Ponder, Andrew v O'Neill, Daniel | 7-5,6-4 |
| ITF - M15 Héraklion | 2020/11/16 07:30 | Jirousek, Tomas v Paroulek, Tadeas | 6-4,3-6,10-8 |
| ITF - M15 Héraklion | 2020/11/11 09:30 | Paroulek, Tadeas v Johnson, Luke | 1-6,2-6 |
| ITF - M15 Héraklion | 2020/11/08 10:30 | Solomatin, Igor v Paroulek, Tadeas | 2-6,2-6 |
| ITF - M15 Héraklion | 2020/11/01 12:00 | Jacopo Berrettini v Paroulek, Tadeas | 6-3,6-3 |
| ITF - M15 Héraklion | 2020/10/26 10:30 | Kirkov, Vasil v Paroulek, Tadeas | 7-6,6-4 |
| ITF - M15 Héraklion | 2020/10/25 10:30 | Paroulek, Tadeas v Manda, Calin | 7-6,6-3 |
| ITF M25 Prague | 2020/09/14 10:30 | Paroulek, Tadeas v Jaroslav Pospisil | 3-6,7-5,2-10 |
| ITF M25 Prague | 2020/09/13 08:00 | Krainer, L. v Paroulek, Tadeas | 4-6,6-1,8-10 |