Stadium: Center Court Round: 62 Ground: Clay
| ITF Germany F4 | 2018/06/16 08:00 | Krstev, Ondrej v Markiewicz, James | 6-1,6-2 |
| Czech Republic F2, Singles | 2018/05/24 10:10 | Rikl, Patrik v Krstev, Ondrej | 6-1,6-4 |
| Czech Republic F2, Singles | 2018/05/22 08:00 | Krstev, Ondrej v Kody Pearson | 2-6,7-5,6-3 |
| ITF Hungary F1 | 2018/05/08 08:00 | Krstev, Ondrej v Frunza, Nicolae | 0-6,0-6 |
| ITF Bahrain F1 | 2018/03/21 08:00 | Jelle Sels v Krstev, Ondrej | 6-3,6-3 |
| ITF Bahrain F1 | 2018/03/20 13:05 | Krstev, Ondrej v Elyas Abdulnabi | 6-4,6-2 |
| ITF Greece F2 | 2018/03/06 12:25 | Tepavac, Marko v Krstev, Ondrej | 6-4,6-2 |
| ITF Greece F2 | 2018/03/05 07:30 | Schorsch, Jeffrey v Krstev, Ondrej | 4-6,3-6 |
| Kuwait F1, Singles Qualifying | 2017/10/28 10:00 | de Valk, Roy Sarut v Yuichiro Inui | 5-7,1-6 |
| ITF Netherlands F5 | 2017/08/14 12:00 | de Valk, Roy Sarut v Bodin, Joris | 7-6,6-7,7-6 |
| ITF Netherlands F5 | 2017/08/13 08:00 | de Valk, Roy Sarut v Clavel, Tom | 6-3,6-1 |
| ITF Belgium F8 Qual | 2017/08/07 08:00 | Kohl, Cristopher v de Valk, Roy Sarut | 2-6,6-2,7-6 |
| ITF Belgium F8 Qual | 2017/08/06 07:30 | Plaza, Marcelo v de Valk, Roy Sarut | 5-7,4-6 |
| ITF Germany F9 | 2017/07/31 15:00 | de Valk, Roy Sarut v Mertens, Nico | 2-6,6-7 |
| ITF Germany F9 | 2017/07/31 09:00 | de Valk, Roy Sarut v Buntsma, Gijs | 2-6,6-2,6-2 |
| ITF Germany F9 | 2017/07/30 13:30 | de Valk, Roy Sarut v Minakov, Mikhail | 6-0,6-0 |