Kostic Stefan (Australia)
- Show:
 Serbia: M15 Kursumlijska Banja 3 - Singles - Main | |||||||
|---|---|---|---|---|---|---|---|
| 1/16-finals | Kostic S. | Frusina A. | 0:2 (3:6, 2:6) | details | 01.05.2024 | ||
| Serbia: M15 Kursumlijska Banja 7 - Singles - Main | |||||||
| 1/16-finals | Kostic S. | Hadzimehmedovic R. | 1:2 (4:6, 6:4, 1:6) | details | 29.08.2023 | ||
 Bosnia and Herzegovina: M15 Sarajevo - Singles - Main | |||||||
| 1/16-finals | Mikrut L. | Kostic S. | 2:0 (6:2, 6:1) | details | 07.06.2023 | ||
| Bosnia and Herzegovina: M25 Kiseljak - Singles - Main | |||||||
| 1/16-finals | Zanellato N. | Kostic S. | 2:0 (6:1, 6:1) | details | 30.05.2023 | ||
| Bosnia and Herzegovina: M15 Brcko - Singles - Main | |||||||
| 1/16-finals | Kostic S. | Aubriot A. | 0:2 (0:6, 1:6) | details | 23.05.2023 | ||
- Show:
| Serbia: M15 Kursumlijska Banja 3 - Doubles - Main | |||||||
|---|---|---|---|---|---|---|---|
| 1/8-finals | Kostic S./Lulic N. | Gomez G./Gueymard Wayenburg S. | 0:2 (1:6, 0:6) | details | 01.05.2024 | ||
| Bosnia and Herzegovina: M15 Sarajevo - Doubles - Main | |||||||
| 1/8-finals | Djokic A./Kostic S. | Otegui J. B./Zukas M. | WO. | details | 07.06.2023 | ||
| Bosnia and Herzegovina: M25 Kiseljak - Doubles - Main | |||||||
| 1/8-finals | Hulme M./Talic Z. | Djokic A./Kostic S. | 2:0 (6:2, 6:3) | details | 31.05.2023 | ||
| Bosnia and Herzegovina: M15 Brcko - Doubles - Main | |||||||
| Quarter-finals | Kijametovic A./Moundir A. | Kalina V./Kostic S. | 2:0 (7:64, 6:3) | details | 25.05.2023 | ||
| 1/8-finals | Cashin M./Djokic A. | Kalina V./Kostic S. | 0:2 (5:7, 3:6) | details | 23.05.2023 | ||