Stadium: Court 3 Round: 25 Ground: Clay
| ITF Hungary F1 Qual | 2016/04/19 08:00 | Frunza, Nicolae v Krstev, Ondrej | 6-2,7-5 |
| 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 |
| ITF Greece F2 | 2018/03/04 09:30 | Fukuoka, Yusei v Krstev, Ondrej | 2-6,4-6 |
| ITF Greece F2 | 2018/03/03 07:30 | Nareyka, Bjorn v Krstev, Ondrej | 6-7,1-6 |
| ITF Tunisia F5 | 2018/02/05 08:00 | Quentin Folliot v Krstev, Ondrej | 6-1,7-6 |
| Tunisia F4, Singles Qualifying | 2018/02/01 09:00 | Krstev, Ondrej v Ortega-Olmedo, Roberto | 2-6,4-6 |
| Coupe Davis | 2018/02/03 10:00 | Frunza, Nicolae v Nastasi, Ugo | 6-7,6-1,3-6 |
| ITF Turkey F2 | 2018/01/18 07:30 | Dimitar Kuzmanov v Frunza, Nicolae | 7-6,6-1 |
| ITF Turkey F2 | 2018/01/16 07:30 | Tabatruong, Maxime v Frunza, Nicolae | 3-6,1-6 |
| ITF Turkey F1 | 2018/01/13 12:00 | Frunza, Nicolae v Quinzi, Gianluigi | 3-6,3-6 |
| ITF Turkey F1 | 2018/01/11 08:00 | Frunza, Nicolae v Yuksel, Anil | 5-7,6-1,6-1 |
| ITF Turkey F1 | 2018/01/10 10:20 | Konecny, Michal v Frunza, Nicolae | 4-6,1-6 |
| Coupe Davis | 2017/10/29 15:15 | Edan Leshem v Frunza, Nicolae | 6-4,6-7,6-2 |
| Coupe Davis | 2017/10/27 13:45 | Sela, Dudi v Frunza, Nicolae | 6-3,6-4,6-4 |