 Spain: M25 Sabadell 2 - Doubles - Main |
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| Semi-finals | Harper C./Montes-De La Torre I. | Alcala Gurri M./Nedelchev N. | 2:0 (6:2, 6:4) | details | 26.09.2024 |
| Quarter-finals | Alcala Gurri M./Nedelchev N. | Sanchez Quilez A./Winter Lopez B. | WO. | details | 25.09.2024 |
| 1/8-finals | Alcala Gurri M./Nedelchev N. | Mondon Sebastian A./Mondon S. A. | 2:0 (6:3, 6:1) | details | 24.09.2024 |
 Bulgaria: Dobrich - Doubles - Main |
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| Quarter-finals | Dinev D./Nedelchev N. | Merino A./Negritu Ch. | 1:2 (7:66, 4:6, 8:10) | details | 22.08.2024 |
| 1/8-finals | Dinev D./Nedelchev N. | Debru G./Gea A. | 2:0 (6:4, 6:2) | details | 21.08.2024 |
| Bulgaria: M15 Sofia - Doubles - Main |
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| Final | Gea A./Orlov V. | Genov A./Nedelchev N. | 1:2 (2:6, 7:63, 7:10) | details | 17.08.2024 |
| Semi-finals | Markov V./Terziev S. | Genov A./Nedelchev N. | 0:2 (2:6, 4:6) | details | 16.08.2024 |
| Quarter-finals | Kobayashi M./Naydenov Y. | Genov A./Nedelchev N. | 0:2 (0:6, 3:6) | details | 15.08.2024 |
| 1/8-finals | Basel V./Ribero F. | Genov A./Nedelchev N. | 0:2 (1:6, 2:6) | details | 13.08.2024 |
 Portugal: M25 Porto - Doubles - Main |
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| Final | Seeman J./Thayne W. | Cook E./Nedelchev N. | 2:0 (6:3, 6:1) | details | 27.07.2024 |
| Semi-finals | Bobrov B./Kirci K. | Cook E./Nedelchev N. | 0:2 (4:6, 4:6) | details | 26.07.2024 |
| Quarter-finals | Cook E./Nedelchev N. | Marques D./Portugal A. | 2:0 (6:4, 6:4) | details | 25.07.2024 |
| 1/8-finals | Cook E./Nedelchev N. | Leote Prata V./Torres T. | 2:0 (7:68, 6:1) | details | 24.07.2024 |
| Spain: M25 Bakio - Doubles - Main |
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| 1/8-finals | Sanchez Quilez A./Winter Lopez B. | Alvarado P./Nedelchev N. | 2:0 (6:3, 6:3) | details | 26.06.2024 |
 Tunisia: M15 Monastir 14 - Doubles - Main |
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| Quarter-finals | Martin D./Nedelchev N. | Chiu J./Simonsson F. | 1:2 (7:69, 4:6, 14:16) | details | 04.04.2024 |
| 1/8-finals | Carteputreda D. C./Tens D. | Martin D./Nedelchev N. | 0:2 (2:6, 1:6) | details | 02.04.2024 |
| Spain: M15 Les Franqueses del Valles - Doubles - Main |
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| Final | Cooper S./Van Tilburg R. | Kravchenko G./Nedelchev N. | 0:2 (3:6, 2:6) | details | 16.03.2024 |
| Semi-finals | Melero K. A./Pedrico Kravtsov A. | Kravchenko G./Nedelchev N. | 0:2 (4:6, 4:6) | details | 15.03.2024 |
| Quarter-finals | Bueno Gil A./Forcano I. | Kravchenko G./Nedelchev N. | 0:2 (5:7, 4:6) | details | 14.03.2024 |
| 1/8-finals | Markovits M./Torcq B. | Kravchenko G./Nedelchev N. | 0:2 (4:6, 1:6) | details | 13.03.2024 |
| Spain: M15 Torello - Doubles - Main |
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| Quarter-finals | Berti M./Iannaccone F. | Kravchenko G./Nedelchev N. | 2:1 (6:4, 4:6, 10:5) | details | 06.03.2024 |
| 1/8-finals | Markovits M./Naharro D. | Kravchenko G./Nedelchev N. | 0:2 (2:6, 5:7) | details | 05.03.2024 |
| Spain: M15 Villena - Doubles - Main |
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| Quarter-finals | Khoeblal E./Nedelchev N. | Davis J./Summers M. | WO. | details | 22.02.2024 |
| 1/8-finals | Khoeblal E./Nedelchev N. | Marrero D./Mulye D. | 2:0 (6:3, 6:2) | details | 20.02.2024 |
| Spain: M15 Manacor 3 - Doubles - Main |
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| 1/8-finals | Kravchenko G./Nedelchev N. | Butvilas E./Lopez Montagud C. | CAN. | details | 23.01.2024 |
| Spain: M15 Manacor 2 - Doubles - Main |
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| 1/8-finals | Kym J./Soriano Barrera A. | Lopez N./Nedelchev N. | 2:1 (5:7, 6:3, 10:5) | details | 16.01.2024 |
 Greece: M25 Heraklion 3 - Doubles - Main |
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| Final | Sakellaridis D./Sakellaridis M. | Genov A./Nedelchev N. | 0:2 (2:6, 1:6) | details | 02.12.2023 |
| Semi-finals | Genov A./Nedelchev N. | Goldenberg L./Shimanov O. | 2:1 (6:2, 64:7, 10:6) | details | 01.12.2023 |
| Quarter-finals | Kimhi O./Vales A. | Genov A./Nedelchev N. | 1:2 (4:6, 6:1, 1:10) | details | 30.11.2023 |