Stadium: Hard Court 2 Round: 62 Ground: Hardcourt outdoor
| ITF Greece F7 | 2018/11/03 10:00 | Garcia, Mathieu v Papounidis, Ioannis | 6-1,6-2 |
| ITF Greece F6 | 2018/10/29 07:30 | Papounidis, Ioannis v Gostincar, Domen | 3-6,3-6 |
| ITF Greece F6 | 2018/10/28 07:30 | Hiramatsu, Shinnosuke v Papounidis, Ioannis | 7-5,1-6,0-6 |
| ITF Spain F29 | 2018/09/22 07:00 | Papounidis, Ioannis v Roumane, Rayane | 3-6,1-6 |
| ITF Spain F18 Qual | 2018/07/07 12:30 | Joffrey De Schepper v Papounidis, Ioannis | 6-1,6-2 |
| ITF Spain F13 | 2018/05/28 08:00 | Papounidis, Ioannis v Luque Rico, Enrique | 4-6,3-6 |
| ITF Spain F13 | 2018/05/27 08:00 | Papounidis, Ioannis v Oervad, Frederik | 6-2,4-6,6-2 |
| ITF Spain F13 | 2018/05/26 09:00 | Alex M Pujolras v Papounidis, Ioannis | 3-6,4-6 |
| ITF - M15 Monastir | 2021/05/04 08:00 | Zachary Svajda v Harry Wendelken | 7-5,6-1 |
| ITF - M15 Monastir | 2021/05/03 12:00 | Pereira, Miguel Fernando v Harry Wendelken | 6-7,5-7 |
| ITF - M15 Monastir | 2021/05/02 10:30 | Taketo Takamisawa v Harry Wendelken | 1-6,4-6 |
| ITF - M15 Monastir | 2021/04/26 12:30 | Remy Bertola v Harry Wendelken | 6-4,3-6,10-5 |
| ITF - M15 Monastir | 2021/04/26 08:00 | Osgar O'Hoisin v Harry Wendelken | 6-4,4-6,7-10 |
| ITF - M15 Monastir | 2021/04/25 09:00 | Kirill Mishkin v Harry Wendelken | 0-6,0-6 |
| ITF - M15 Monastir | 2021/04/20 08:00 | Harry Wendelken v Martinez, Mirko | 1-6,2-6 |
| ITF - M15 Monastir | 2021/04/19 13:00 | Andrea Guerrieri v Harry Wendelken | 6-3,1-6,4-10 |