Stadium: Court 4 Round: 25 Ground: Clay
| ITF Russia F6 | 2018/08/14 09:45 | Maxim Ratniuk v Markos Kalovelonis | 6-4,7-5 |
| ITF M15 - Parnu | 2019/07/18 12:25 | Luigi Sorrentino v Maxim Ratniuk | 6-2,7-6 |
| ITF M15 - Vilnius | 2019/07/10 08:00 | Maxim Ratniuk v Alexey Zakharov | 4-6,4-6 |
| ITF M15 - Wroclaw | 2019/07/03 08:00 | Maxim Ratniuk v Oleg Prihodko | 6-3,2-6,1-6 |
| ITF M25 - Kiseljak | 2019/05/28 11:40 | Jordan Correia v Maxim Ratniuk | 6-3,6-3 |
| ITF M15 - Brcko | 2019/05/23 08:30 | Maxim Ratniuk v Christopher O'Connell | 1-6,1-6 |
| ITF M15 - Brcko | 2019/05/22 07:00 | Maxim Ratniuk v Nebojsa Milenkovic | 6-3,6-0 |
| ITF M25 Namangan | 2019/05/01 10:00 | Maxim Ratniuk v Matvey Minin | 6-7,2-6 |
| ITF M15 - Antalya | 2019/04/17 14:15 | Maxim Ratniuk v Patrik Niklas-Salminen | 4-6,2-6 |
| ITF M25 - Nonthaburi | 2019/07/30 07:40 | Markos Kalovelonis v Yu Hsiou Hsu | 3-6,2-6 |
| ITF M25 - Nonthaburi | 2019/07/24 02:00 | Markos Kalovelonis v Dusty H. Boyer | 3-6,6-7 |
| ITF M15 - Belgrad | 2019/07/03 14:45 | Matic Spec v Markos Kalovelonis | 6-4,7-5 |
| ITF M15 - Akko | 2019/06/13 07:00 | Markos Kalovelonis v Igor Smilansky | 7-6,3-6,1-6 |
| ITF M15 - Akko | 2019/06/12 08:00 | Markos Kalovelonis v Boris Pokotilov | 7-6,6-4 |
| ITF M15 - Heraklion | 2019/06/01 09:10 | Markos Kalovelonis v Michail Pervolarakis | 4-6,0-6 |
| ITF M15 - Heraklion | 2019/05/31 07:00 | Peter Kobelt v Markos Kalovelonis | 4-6,4-6 |
| ITF M15 - Heraklion | 2019/05/30 09:50 | Joshua Paris v Markos Kalovelonis | 4-6,6-3,3-6 |