Stadium: Court 4 Round: 14 Ground: Clay
| ATP Miami | 2021/03/22 15:40 | Tatsuma Ito v Ivo Karlovic | 3-6,6-7 |
| Challenger Nur-Sultan | 2021/03/01 10:55 | Denis Yevseyev v Tatsuma Ito | 4-6,6-2,3-6 |
| Challenger Nur-Sultan | 2021/02/25 07:10 | Jurij Rodionov v Tatsuma Ito | 6-3,6-2 |
| Challenger Nur-Sultan | 2021/02/24 05:25 | Tatsuma Ito v Vladyslav Manafov | 6-4,6-4 |
| Challenger Istanbul | 2021/01/17 08:50 | Ernesto Escobedo v Tatsuma Ito | 6-1,4-6,6-4 |
| Australian Open | 2021/01/11 10:20 | Tatsuma Ito v Yannick Maden | 4-6,2-6 |
| Challenger Split | 2020/09/29 11:20 | Viktor Troicki v Tatsuma Ito | 6-2,6-4 |
| French Open | 2020/09/21 15:10 | Tatsuma Ito v Nikola Milojevic | 6-4,0-6,1-6 |
| Challenger Rome Qual | 2021/04/25 08:00 | Viktor Galovic v Evgeny Karlovskiy | 3-6,4-6 |
| Challenger Split Qual | 2021/04/11 09:00 | Zdenek Kolar v Viktor Galovic | 6-1,6-4 |
| Challenger Potchefstroom | 2021/02/16 09:35 | Liam Broady v Viktor Galovic | 6-3,6-1 |
| Challenger Potchefstroom | 2021/02/08 10:50 | Peter Polansky v Viktor Galovic | 6-2,3-6,7-6 |
| ITF M15 Antalya | 2021/01/21 09:55 | Nicolae Frunza v Viktor Galovic | 6-2,7-5 |
| ATP Delray Beach | 2021/01/06 16:00 | Viktor Galovic v Roberto Quiroz | 3-6,5-7 |
| ATP Delray Beach | 2021/01/05 15:00 | Viktor Galovic v Mohamed Aziz Dougaz | 6-4,6-3 |
| Challenger Ortisei | 2020/11/14 09:00 | Johannes Haerteis v Viktor Galovic | 4-6,7-6,6-4 |