Round: 62 Ground: Hardcourt outdoor
| ITF Greece F7 | 2015/10/11 09:30 | Cosmin Ontica v Matthew Hingley | 6-3,6-3 |
| ITF Romania F15 | 2015/08/29 06:30 | Cosmin Ontica v Andrei Patrui | 7-6,3-6,1-6 |
| ITF Romania F12 | 2015/08/11 10:25 | Dragos Constantin Ignat v Cosmin Ontica | 6-2,3-6,1-6 |
| ITF Romania F12 | 2015/08/10 09:00 | Cosmin Ontica v Mihaita Daniel Damian | 6-4,6-1 |
| ITF Romania F10 | 2015/07/19 14:30 | Cosmin Ontica v Vlad Protopopescu | 6-4,6-1 |
| ITF Romania F9 | 2015/07/14 13:15 | Cosmin Ontica v Laurynas Grigelis | 1-6,1-6 |
| ITF Romania F9 | 2015/07/13 10:15 | Cosmin Ontica v Lorenzo Schmid | 6-1,6-2 |
| ITF Romania F9 | 2015/07/12 09:00 | Cosmin Ontica v Aland Moyna | 6-2,6-1 |
| Davis Cup | 2015/07/16 09:00 | Ioannis Stergiou v Pietro Grassi | 6-1,6-1 |
| ITF Greece F2 Qual | 2015/03/29 08:30 | Tomas Papik v Ioannis Stergiou | 6-4,6-3 |
| ITF Greece F2 Qual | 2015/03/28 09:30 | Aleksandar Jocic v Ioannis Stergiou | 0-6,0-6 |
| ITF Greece F1 | 2015/03/24 10:50 | Alessandro Bega v Ioannis Stergiou | 6-3,6-1 |
| ITF Greece F9 Qual | 2014/11/02 07:00 | Miljan Zekic v Ioannis Stergiou | 7-5,6-1 |
| ITF Greece F10 Qual | 2014/10/26 09:30 | Ioannis Stergiou v Dominik Kellovsky | 6-7,4-6 |
| ITF Greece F9 | 2014/10/21 07:00 | Ioannis Stergiou v Marek Semjan | 3-6,5-7 |
| ITF Greece F3 | 2014/03/25 08:00 | Ioannis Stergiou v Ivan Bjelica | 2-6,1-6 |