Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| ITF Great Britain F5 | 2017/09/19 12:25 | Gray, Jonathan v Zgombic, Fran Zvonimir | 7-6,6-4 |
| ITF Greece F3 | 2018/03/14 08:00 | Gray, Jonathan v Enrico Dalla Valle | 6-4,6-7,7-6 |
| ITF Greece F2 | 2018/03/08 10:35 | Authom, Maxime v Gray, Jonathan | 6-2,7-6 |
| ITF Greece F2 | 2018/03/07 10:00 | Van Terheijden, Tim v Gray, Jonathan | 6-7,0-6 |
| ITF Greece F1 | 2018/03/01 08:00 | Giovanni Fonio v Gray, Jonathan | 6-4,1-6,6-3 |
| ITF Greece F1 | 2018/02/27 08:30 | Kohen, Alan v Gray, Jonathan | 6-4,2-6,3-6 |
| ITF Great Britain F3 | 2018/02/13 15:15 | Glasspool, Lloyd v Gray, Jonathan | 7-6,6-1 |
| ITF Great Britain F2 | 2018/02/07 12:30 | Gray, Jonathan v David Pichler | 4-6,6-1,6-7 |
| ITF Turkey F2 | 2018/01/16 07:30 | Gianluca Mager v Gray, Jonathan | 6-4,6-2 |
| ITF Greece F3 | 2018/03/14 14:55 | Matos, Diego v Zgombic, Fran Zvonimir | 1-6,6-7 |
| ITF Greece F3 | 2018/03/12 08:00 | Zgombic, Fran Zvonimir v Paroulek, Tadeas | 6-1,6-7,6-4 |
| ITF Greece F3 | 2018/03/11 08:00 | Zgombic, Fran Zvonimir v Knoop, Herman Meeuwes Mattheo | 7-5,6-2 |
| ITF Greece F3 | 2018/03/10 07:30 | Zgombic, Fran Zvonimir v Manekas, Athanassios | 6-2,5-7,6-4 |
| ITF Italy F1 | 2018/03/01 13:00 | Boutillier, Remi v Zgombic, Fran Zvonimir | 7-5,6-2 |
| ITF Italy F1 | 2018/02/27 15:45 | Federico Iannaccone v Zgombic, Fran Zvonimir | 4-6,6-0,3-6 |
| ITF Italy F1 Qual | 2018/02/25 12:10 | Marcora, Roberto v Zgombic, Fran Zvonimir | 6-3,7-6 |
| ITF Italy F1 Qual | 2018/02/24 12:25 | Louroi Martinez v Zgombic, Fran Zvonimir | 4-6,3-6 |