 Croatia: M15 Split - Doubles - Main |
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| Quarter-finals | Kupcic J./Vetrih M. | Bielinskyi V./Szajrych J. | 0:2 (5:7, 4:6) | details | 25.04.2024 |
| 1/8-finals | Mardesic D./Smolcic N. | Kupcic J./Vetrih M. | 0:2 (2:6, 1:6) | details | 25.04.2024 |
| Croatia: M15 Rovinj - Doubles - Main |
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| Quarter-finals | Mikrut L./Poljicak M. | Basic N./Kupcic J. | 2:1 (3:6, 6:1, 10:4) | details | 14.03.2024 |
| 1/8-finals | Ban I. K./Brkic J. | Basic N./Kupcic J. | 0:2 (3:6, 0:6) | details | 13.03.2024 |
| Croatia: M15 Porec - Doubles - Main |
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| 1/8-finals | Kaukovalta P./Kupcic J. | Bill A./Mikrut L. | 1:2 (2:6, 7:64, 3:10) | details | 05.03.2024 |
 Egypt: M15 Sharm ElSheikh 20 - Doubles - Main |
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| 1/8-finals | Binda A./Kupcic J. | Butulija B./Ivanov S. | 1:2 (7:5, 4:6, 5:10) | details | 12.12.2023 |
| Egypt: M15 Sharm ElSheikh 19 - Doubles - Main |
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| Quarter-finals | Binda A./Kupcic J. | Fumagalli F./Vincent Ruggeri S. | 0:2 (5:7, 4:6) | details | 07.12.2023 |
| 1/8-finals | Binda A./Kupcic J. | Maamoun K.M./Zakaryia F. | 2:0 (7:64, 6:4) | details | 05.12.2023 |
| Egypt: M15 Sharm ElSheikh 18 - Doubles - Main |
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| Semi-finals | Kroslak J./Kupcic J. | Lomakin G./Philippov E. | 0:2 (65:7, 3:6) | details | 01.12.2023 |
| Quarter-finals | Kroslak J./Kupcic J. | Beckley A./Elsayed A. | 2:1 (61:7, 6:2, 10:7) | details | 30.11.2023 |
| 1/8-finals | Dzhavakian Y./Zahraj P. | Kroslak J./Kupcic J. | 1:2 (64:7, 7:62, 7:10) | details | 28.11.2023 |
 Tunisia: M15 Monastir 44 - Doubles - Main |
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| 1/8-finals | Kupcic J./Premzl M. | Lipovsek Puches T./Otegui J. B. | 0:2 (5:7, 4:6) | details | 31.10.2023 |
 Austria: M15 Bad Waltersdorf - Doubles - Main |
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| 1/8-finals | Kremenchutskyi I./Podorozhnyi A. | Kupcic J./Premzl M. | 2:1 (3:6, 6:4, 10:7) | details | 03.10.2023 |
 Slovenia: M25 Maribor 2 - Doubles - Main |
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| Semi-finals | Mikrut L./Poljicak M. | Basic N./Kupcic J. | 2:1 (65:7, 6:1, 10:6) | details | 07.09.2023 |
| Quarter-finals | Knaff A./Rodesch C. | Basic N./Kupcic J. | 1:2 (6:3, 3:6, 9:11) | details | 06.09.2023 |
| 1/8-finals | Gramaticopolo B./La Vela G. | Basic N./Kupcic J. | 0:2 (2:6, 1:6) | details | 05.09.2023 |
| Slovenia: M25 Maribor - Doubles - Main |
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| Final | Basic M./Topo M. | Basic N./Kupcic J. | 1:2 (5:7, 6:4, 9:11) | details | 02.09.2023 |
| Semi-finals | Gramaticopolo B./Serafini M. | Basic N./Kupcic J. | 0:2 (2:6, 4:6) | details | 01.09.2023 |
| Quarter-finals | Bezjak G./Kovacic T. | Basic N./Kupcic J. | 0:2 (4:6, 4:6) | details | 31.08.2023 |
| 1/8-finals | Basic N./Kupcic J. | Biljesko D./Kopp S. | 2:0 (7:5, 6:3) | details | 29.08.2023 |
| Croatia: M25 Osijek - Doubles - Main |
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| Semi-finals | Jakic M./Milicevic S. | Juhas K./Kupcic J. | 2:1 (6:4, 3:6, 10:2) | details | 11.08.2023 |
| Quarter-finals | Juhas K./Kupcic J. | Michalik R./Nad P. | 2:1 (4:6, 7:63, 10:8) | details | 10.08.2023 |
| 1/8-finals | Juhas K./Kupcic J. | Gomez G./Pavlovic L. | 2:0 (6:2, 7:60) | details | 08.08.2023 |
 Serbia: M15 Novi Sad - Doubles - Main |
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| 1/8-finals | Aboian L./Aboian V. | Kupcic J./Protic Zakelj J. | 2:0 (6:3, 6:1) | details | 25.07.2023 |
| Slovenia: M15 Celje - Doubles - Main |
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| 1/8-finals | Donski A./Talic Z. | Kupcic J./Planinsek F. J. | 2:1 (6:4, 4:6, 10:5) | details | 29.06.2023 |
| Slovenia: M15 Store - Doubles - Main |
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| Semi-finals | Dominko S./Kupcic J. | Donald M./Nicod J. | 0:2 (4:6, 4:6) | details | 23.06.2023 |
| Quarter-finals | Dimic M./Vetrih M. | Dominko S./Kupcic J. | 0:2 (0:6, 2:6) | details | 22.06.2023 |
| 1/8-finals | Dimitrijevic J./Emersic Potocnik G. | Dominko S./Kupcic J. | 0:2 (5:7, 3:6) | details | 20.06.2023 |
| Slovenia: M15 Litija - Doubles - Main |
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| Final | Hrazdil J./Safranek V. | Dominko S./Kupcic J. | 2:0 (6:4, 6:4) | details | 17.06.2023 |
| Semi-finals | Donski A./Kellovsky D. | Dominko S./Kupcic J. | 0:2 (4:6, 5:7) | details | 16.06.2023 |
| Quarter-finals | Dominko S./Kupcic J. | Guillen Meza A./Otegui J. B. | WO. | details | 15.06.2023 |
| 1/8-finals | Dominko S./Kupcic J. | Dudun I./Podorozhnyi A. | 2:0 (6:4, 6:4) | details | 13.06.2023 |
Romania: M15 Arad - Singles - Main