| ITF USA F30 | 11/03 16:00 | 60 | Kaplja, Aljaz Jakob v Alejandro H Franco | 2-6,2-6 | |
| ITF USA F30 | 11/02 15:30 | 60 | Zapata, Sebastian v Kaplja, Aljaz Jakob | 1-6,7-5,2-6 | |
| ITF USA F29 | 10/27 14:00 | 60 | Scott Jones v Kaplja, Aljaz Jakob | 6-3,6-3 | |
| Portoroz, Slovénie | 08/07 17:10 | 25 | Altug Celikbilek v Kaplja, Aljaz Jakob | 6-0,6-1 | |
| ITF USA F35 | 10/29 18:00 | 60 | Friedrich, Gabriel v Kaplja, Aljaz Jakob | 7-5,6-3 | |
| ITF USA F35 | 10/27 16:00 | 60 | Duan, Jia Qi v Kaplja, Aljaz Jakob | 5-7,1-6 | |
| ITF Greece F11 | 11/20 08:00 | 62 | Kaplja, Aljaz Jakob v Bilic, Ante | 4-6,4-6 | |
| ITF Greece F10 Qual | 11/13 10:30 | 62 | August Holmgren v Kaplja, Aljaz Jakob | 6-3,6-2 | |
| ITF Greece F10 Qual | 11/12 07:00 | 62 | Atanasov, Martin v Kaplja, Aljaz Jakob | 2-6,0-6 | |
| ITF Greece F9 | 11/09 09:10 | 25 | Tybar, Maxim v Kaplja, Aljaz Jakob | 6-1,6-3 | |
| ITF Croatia F8 - Final | 09/25 10:00 | 62 | Kaplja, Aljaz Jakob v Nincevic, Frane | 4-6,0-6 | |
| ITF Serbia F8 | 09/20 08:00 | 25 | Maciej Rajski v Kaplja, Aljaz Jakob | 6-0,6-0 | |
| ITF Serbia F7 Qual | 09/10 07:00 | 62 | Kaplja, Aljaz Jakob v Pjevcevic, Petar | 5-7,6-1,4-6 | |
| ITF Serbia F6 | 09/08 09:20 | 26 | Kaplja, Aljaz Jakob v Jotovski, Tomislav | 3-6,3-6 | |
| ITF Serbia F6 | 09/07 10:05 | 25 | Milenkovic, Nebojsa v Kaplja, Aljaz Jakob | 6-1,6-7,0-6 | |
| ITF Austria F6 | 08/13 09:30 | 62 | Koncilia, Lukas v Kaplja, Aljaz Jakob | 6-1,7-6 | |
| ITF Austria F4 Qual | 07/23 07:00 | 62 | Khrustalev, Nazar v Kaplja, Aljaz Jakob | 4-6,5-7 | |
| ITF Germany F8 Qual | 07/17 08:30 | 62 | Karlo Cubelic v Kaplja, Aljaz Jakob | 6-3,7-5 | |
| ITF Bosnia and Herzegovina F2 Qual | 05/15 08:00 | 44 | Kaplja, Aljaz Jakob v Orlita, Daniel | 7-6,1-6,2-6 | |
| ITF Greece F5 | 04/16 11:30 | 62 | Kaplja, Aljaz Jakob v Davies, George | 5-7,0-6 | |
| ITF Croatia F3 | 03/13 09:00 | 60 | Kaplja, Aljaz Jakob v Luigi Sorrentino | 1-6,2-6 | |
| ITF Croatia F2 | 03/06 11:30 | 60 | Baluda, Victor v Kaplja, Aljaz Jakob | 6-2,6-0 | |
| ITF Croatia F2 | 03/06 08:30 | 60 | Kaplja, Aljaz Jakob v Querol Cherigny, Daniel | 6-0,6-4 |