Stadium: Court 1 Round: 26 Ground: Clay
| Challenger Poznan | 2018/06/05 10:25 | Facundo Bagnis v Jozef Kovalik | 6-3,7-5 |
| French Open | 2018/05/27 10:55 | Jozef Kovalik v Pablo Carreno Busta | 6-4,1-6,5-7,6-7 |
| French Open Qual | 2018/05/25 10:25 | Peter Polansky v Jozef Kovalik | 6-7,6-7 |
| French Open Qual | 2018/05/24 08:00 | Reilly Opelka v Jozef Kovalik | 2-6,6-3,6-7 |
| French Open Qual | 2018/05/22 09:40 | Jozef Kovalik v Alexey Vatutin | 2-6,6-1,6-3 |
| Challenger Rome | 2018/05/09 11:45 | Jozef Kovalik v Vaclav Safranek | 6-7,7-5,3-6 |
| Challenger Rome | 2018/05/08 12:35 | Jozef Kovalik v Andrej Martin | 7-5,6-4 |
| ATP Munich Qual | 2018/04/29 13:20 | Martin Klizan v Jozef Kovalik | 6-1,6-2 |
| Challenger Shymkent | 2018/06/04 08:05 | Roberto Cid Subervi v Tsung-Hua Yang | 1-6,6-0,6-1 |
| Challenger Mestre | 2018/05/23 08:30 | Tsung-Hua Yang v Laurynas Grigelis | 3-6,0-6 |
| Challenger Samarkand | 2018/05/18 06:00 | Luca Vanni v Tsung-Hua Yang | 6-2,6-4 |
| Challenger Samarkand | 2018/05/17 10:00 | Aldin Setkic v Tsung-Hua Yang | 2-6,3-6 |
| Challenger Samarkand | 2018/05/15 08:20 | Farrukh Dustov v Tsung-Hua Yang | 1-6,3-6 |
| Challenger Karshi | 2018/05/09 05:30 | Carlos Boluda-Purkiss v Tsung-Hua Yang | 6-4,5-7,7-6 |
| Challenger Karshi | 2018/05/08 06:45 | Alessandro Bega v Tsung-Hua Yang | 4-6,4-6 |
| Challenger Seoul | 2018/05/04 03:00 | Jordan Thompson v Tsung-Hua Yang | 6-1,6-3 |