Stadium: Court 2 Round: 26 Ground: Clay
| ITF Bosnia and Herzegovina F2 | 2017/06/01 10:15 | Kalenichenko, Danylo v Stergiou, Ioannis | 4-6,3-6 |
| ITF Bosnia and Herzegovina F2 | 2018/05/23 12:30 | Jandric, Darko v Stergiou, Ioannis | 0-6,3-6 |
| ITF Bosnia and Herzegovina F1 | 2018/05/15 08:00 | Stergiou, Ioannis v Hajek, Petr | 6-1,3-6,6-7 |
| Coupe Davis | 2018/04/06 08:00 | Cungu, Rrezart v Stergiou, Ioannis | 7-6,6-2 |
| Coupe Davis | 2018/04/05 09:15 | Stergiou, Ioannis v Khachatryan, Sedrak | 6-1,6-3 |
| Coupe Davis | 2018/04/04 07:00 | Grinvalds, Roberts v Stergiou, Ioannis | 0-6,4-6 |
| ITF Greece F5 | 2018/03/29 10:15 | Stergiou, Ioannis v Tomas Barrios Vera | 3-6,3-6 |
| ITF Greece F5 | 2018/03/28 06:00 | Kalovelonis, Markos v Stergiou, Ioannis | 3-6,2-6 |
| ITF Greece F4 | 2018/03/21 12:45 | Petr Michnev v Stergiou, Ioannis | 6-4,6-4 |
| ITF Bosnia and Herzegovina F2 | 2018/05/23 08:00 | Zhao, Lingxi v Kalenichenko, Danylo | 6-7,6-0,2-6 |
| ITF Nigeria F3 | 2018/04/30 13:15 | Hossam, Youssef v Kalenichenko, Danylo | 6-2,6-2 |
| Nigeria F2, Singles | 2018/04/25 09:00 | Kalenichenko, Danylo v Neuchrist, Maximilian | 4-6,2-6 |
| Nigeria F2, Singles | 2018/04/23 09:00 | Kalenichenko, Danylo v Largo, Hugo | 6-4,3-6,6-4 |
| Nigeria F1, Singles | 2018/04/20 11:05 | Kalenichenko, Danylo v Joao Menezes | 1-6,1-6 |
| Nigeria F1, Singles | 2018/04/19 10:40 | Kalenichenko, Danylo v Jacobs, Tuki | 6-1,6-3 |
| Nigeria F1, Singles | 2018/04/18 09:00 | Sabanov, Ivan v Kalenichenko, Danylo | 4-6,3-6 |
| Nigeria F1, Singles | 2018/04/17 12:00 | Kalenichenko, Danylo v Matos, Diego | 3-6,6-3,6-3 |