Stadium: Court 6 Round: 25
| ITF Turkey F34 | 2017/09/15 12:40 | Ken Onishi v Patricio Heras | 1-6,1-6 |
| ITF Italy F11 | 2018/05/24 11:00 | Patricio Heras v Alexander Lazov | 2-6,7-6,1-6 |
| ITF Italy F11 | 2018/05/23 11:45 | Patricio Heras v Riccardo Balzerani | 6-2,3-6,6-4 |
| Challenger Samarkand | 2018/05/15 09:50 | Ivan Gakhov v Patricio Heras | 7-5,7-6 |
| Challenger Rome | 2018/05/10 12:50 | Patricio Heras v Adam Pavlasek | 6-7,1-6 |
| Challenger Rome | 2018/05/09 10:05 | Patricio Heras v Viktor Galovic | 7-6,6-0 |
| Challenger Rome | 2018/05/08 08:30 | Patricio Heras v Giovanni Fonio | 6-4,3-6,7-5 |
| Challenger Rome Qual | 2018/05/07 08:00 | Andreas Haider-Maurer v Patricio Heras | 7-6,6-4 |
| Challenger Rome Qual | 2018/05/06 11:40 | Enrico Dalla Valle v Patricio Heras | 4-6,4-6 |
| ITF Hungary F4 Qual | 2018/06/11 08:00 | Ken Onishi v Kristjan Tamm | 6-3,2-6,6-3 |
| ITF Hungary F4 Qual | 2018/06/10 08:00 | Ken Onishi v Boris Butulija | 6-4,6-7,6-4 |
| ITF Czech Republic F3 | 2018/05/31 12:35 | Marek Jaloviec v Ken Onishi | 6-2,6-3 |
| ITF Hungary F3 | 2018/05/23 08:00 | Samuel Bensoussan v Ken Onishi | 6-1,6-4 |
| ITF Hungary F3 | 2018/05/22 11:20 | Ken Onishi v Matej Maruscak | 6-1,6-4 |
| ITF Bosnia and Herzegovina F1 | 2018/05/16 12:30 | Ken Onishi v Fran Zvonimir Zgombic | 6-2,3-6,4-6 |
| ITF Turkey F13 | 2018/04/01 08:30 | Ken Onishi v Gilbert S K Junior | 3-6,6-7 |
| ITF Turkey F13 | 2018/03/31 08:30 | Ken Onishi v Phongsapak Kerdlaphee | 6-4,6-2 |