stadio: Hard Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF Grecia F7 | 2018/11/08 11:10 | Ioannis Stergiou v Markos Kalovelonis | 2-6,4-6 |
| ITF Grecia F5 | 2018/03/28 06:00 | Markos Kalovelonis v Ioannis Stergiou | 3-6,2-6 |
| ITF M15 Heraklion | 2019/05/13 09:00 | Ioannis Stergiou v Pietro R Scomparin | 6-2,6-7,5-10 |
| ITF M15 Heraklion | 2019/05/08 07:00 | Peter Bothwell v Ioannis Stergiou | 6-3,6-3 |
| ITF M15 Antalya | 2019/04/02 07:00 | Grigoriy Lomakin v Ioannis Stergiou | 6-4,6-4 |
| ITF M15 Antalya | 2019/04/01 07:00 | Andrej Krajcik v Ioannis Stergiou | 4-6,1-6 |
| ITF M15 Antalya | 2019/03/27 07:00 | Ioannis Stergiou v Dmitry Popko | 2-6,2-6 |
| ITF M15 Antalya | 2019/03/26 07:00 | Dostanbek Tashbulatov v Ioannis Stergiou | 3-6,7-6,11-13 |
| ITF M15 Antalya | 2019/03/25 07:00 | Sergei Pogosian v Ioannis Stergiou | 6-7,2-6 |
| ITF M15 Antalya | 2019/03/05 08:15 | Bastian Trinker v Ioannis Stergiou | 6-3,6-3 |
| ITF M15 Tbilisi | 2019/05/03 06:00 | Markos Kalovelonis v Mark Whitehouse | 6-3,4-6,3-6 |
| ITF M15 Tbilisi | 2019/05/02 06:00 | Markos Kalovelonis v Viacheslav Yulik | 3-6,7-6,6-2 |
| ITF M15 Tbilisi | 2019/05/01 06:00 | Markos Kalovelonis v Ben Jones | 3-6,7-6,6-3 |
| ITF M25 Andijan | 2019/04/26 07:00 | Markos Kalovelonis v Khumoyun Sultanov | 1-6,4-6 |
| ITF M25 Andijan | 2019/04/23 10:10 | Markos Kalovelonis v Timofey Skatov | 7-6,7-5 |
| ITF M25 Shymkent | 2019/04/17 05:40 | Markos Kalovelonis v Artem Dubrivnyy | 1-6,4-6 |
| ITF M25 Shymkent | 2019/04/11 03:30 | Markos Kalovelonis v Alen Avidzba | 3-6,3-6 |
| ITF M25 Shymkent | 2019/04/10 12:05 | Markos Kalovelonis v Grigoriy Korobeynikov | 6-2,6-4 |