| Date | Category | Player | Score | Opponent | Tournament |
|---|---|---|---|---|---|
| 2018-12-23 | 18 | Ivan Markušić | 3-6 6-4 6-2 | Marko Inđić | DVORANSKO OP TK PONIKVE |
| 2018-12-22 | 18 | Ivan Markušić | 6-2 3-6 7-5 | Adrijan Hržić | DVORANSKO OP TK PONIKVE |
| 2018-12-22 | 18 | Ivan Markušić | 7-6(6) 6-0 | Tin Samac | DVORANSKO OP TK PONIKVE |
| 2018-09-30 | 18 | Ivan Markušić | 6-0 6-4 | Ivan Karlo Ban | KUP BANA JOSIPA JELAČIĆA |
| 2018-09-29 | 18 | Ivan Markušić | 6-3 6-1 | Fran Stilinović | KUP BANA JOSIPA JELAČIĆA |
| 2018-09-29 | 18 | Markušić/Martinčić | 6-3 6-4 | Kranjčević/Šarunić | KUP BANA JOSIPA JELAČIĆA |
| 2018-04-29 | 18 | Markušić/Mrvac | 5-7 6-0 10/4 | Kranjčević/Šarunić | OP TK SAMOBOR 1890 |
| 2018-04-28 | 18 | Ivan MARKUŠIĆ | 6-4 7-6(4) | Marko INĐIĆ | OP TK SAMOBOR 1890 |
| 2018-04-28 | 18 | Ivan MARKUŠIĆ | 6-2 6-1 | Luka VIDOVIĆ | OP TK SAMOBOR 1890 |
| 2018-04-28 | 18 | Markušić/Mrvac | 6-2 7-5 | Sabljak/Sain | OP TK SAMOBOR 1890 |
| 2018-04-17 | 18 | MARKUŠIĆ/MRVAC | 6-4 6-2 | Ajduković/Suevich | PRVENSTVO HRVATSKE DO 18 GODINA |
| 2018-04-16 | 18 | MARKUŠIĆ/MRVAC | 6-4 6-2 | Gušćić/Kranjčević | PRVENSTVO HRVATSKE DO 18 GODINA |
| 2018-04-14 | 18 | Ivan MARKUŠIĆ | 4-6 6-2 6-1 | Marko ZALUKAR | PRVENSTVO HRVATSKE DO 18 GODINA |
| 2018-02-09 | 18 | Ivan MARKUŠIĆ | 6-3 6-2 | Božo BARUN | DVORANSKO PRVENSTVO HRVATSKE JUNIORI 18 |