 Bulgaria: Sofia - Singles - Main |
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| 1/16-finals | Caruso S. | Kuzmanov D. | 2:1 (4:6, 6:4, 6:4) | details | 09.11.2020 |
 Portugal: Lisbon - Singles - Main |
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| Quarter-finals | Kuzmanov D. | Giannessi A. | 0:2 (4:6, 3:6) | details | 16.10.2020 |
| 1/8-finals | Bonzi B. | Kuzmanov D. | 0:2 (5:7, 2:6) | details | 14.10.2020 |
| 1/16-finals | Ferreira Silva F. | Kuzmanov D. | 0:2 (5:7, 3:6) | details | 12.10.2020 |
 Switzerland: M25 Klosters - Singles - Main |
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| 1/16-finals | Rune H. | Kuzmanov D. | 2:1 (2:6, 6:1, 6:1) | details | 16.09.2020 |
 Poland: M25 Poznan - Singles - Main |
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| Final | Zuk K. | Kuzmanov D. | 2:0 (7:66, 6:1) | details | 30.08.2020 |
| Semi-finals | Sels J. | Kuzmanov D. | 1:2 (7:5, 3:6, 4:6) | details | 29.08.2020 |
| Quarter-finals | Kuzmanov D. | Serdarusic N. | 2:0 (6:4, 6:3) | details | 28.08.2020 |
| 1/8-finals | Kuzmanov D. | Meligeni Rodrigues Alves F. | 2:0 (7:5, 6:4) | details | 27.08.2020 |
| 1/16-finals | Kuzmanov D. | Rodriguez C. | 2:0 (6:2, 6:4) | details | 26.08.2020 |
 Austria: M25 Vogau - Singles - Main |
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| Final | Guinard M. | Kuzmanov D. | 2:0 (6:3, 6:3) | details | 23.08.2020 |
| Semi-finals | Rune H. | Kuzmanov D. | 0:2 (3:6, 4:6) | details | 22.08.2020 |
| Quarter-finals | Miedler L. | Kuzmanov D. | 1:2 (4:6, 7:60, 63:7) | details | 21.08.2020 |
| 1/8-finals | Kuzmanov D. | Cerundolo J. M. | 2:1 (6:2, 4:6, 7:5) | details | 20.08.2020 |
| 1/16-finals | Kuzmanov D. | Hamou M. | 2:0 (6:2, 6:4) | details | 18.08.2020 |
 Europe: Eastern European Championship 2 - Third stage |
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| | Kuzmanov D. | Miladinovic M. | 2:0 (6:2, 6:0) | details | 31.07.2020 |
| | Kuzmanov D. | Tadic V. | 2:0 (6:1, 6:1) | details | 30.07.2020 |
| | Kuzmanov D. | Butulija B. | 2:0 (6:0, 6:0) | details | 27.07.2020 |
| Europe: Eastern European Championship - Second stage |
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| Group F | Kuzmanov D. | Pavlovic L. | 1:0 CAN. (6:1, 4:1) | details | 25.06.2020 |
| Group F | Ruusuvuori E. | Kuzmanov D. | AWA. | details | 24.06.2020 |
| Group F | Kuzmanov D. | Brkic T. | 2:0 (6:3, 6:4) | details | 23.06.2020 |
| Europe: Eastern European Championship - First stage - Play Offs |
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| | Kuzmanov D. | Tepavac M. | 0:1 RET. (2:6) | details | 18.06.2020 |
| Europe: Eastern European Championship - First stage |
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| Group G | Kuzmanov D. | Shevchenko A. | 2:0 (6:4, 6:1) | details | 17.06.2020 |
 World: Davis Cup - World Group II - Singles - Preliminary |
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| | Flores J. | Kuzmanov D. | 0:2 (4:6, 3:6) | details | 08.03.2020 |
| | Saborio J. | Kuzmanov D. | 0:2 (4:6, 2:6) | details | 07.03.2020 |
 Turkey: M25 Antalya - Singles - Main |
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| Quarter-finals | Forejtek J. | Kuzmanov D. | 2:1 (6:4, 3:6, 7:5) | details | 28.02.2020 |
| 1/8-finals | Sanchez Izquierdo N. | Kuzmanov D. | 0:2 (1:6, 4:6) | details | 27.02.2020 |
| 1/16-finals | Miladinovic M. | Kuzmanov D. | 1:2 (6:1, 5:7, 0:6) | details | 26.02.2020 |
 Germany: Koblenz - Singles - Main |
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| Quarter-finals | Kuzmanov D. | Machac T. | 0:2 (4:6, 4:6) | details | 21.02.2020 |
| 1/8-finals | Kuzmanov D. | Brown D. | 2:1 (4:6, 6:3, 6:4) | details | 20.02.2020 |
| 1/16-finals | Janvier M. | Kuzmanov D. | 0:2 (4:6, 5:7) | details | 19.02.2020 |
| 1/32-finals | Kuzmanov D. | Orlov V. | 2:0 (6:2, 6:1) | details | 17.02.2020 |
 France: Cherbourg - Singles - Main |
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| 1/32-finals | Kuzmanov D. | Arnaboldi A. | 0:2 (4:6, 2:6) | details | 09.02.2020 |
 Australia: ATP Cup - Singles - Main |
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| | Darcis S. | Kuzmanov D. | 0:2 (0:6, 3:6) | details | 07.01.2020 |
| | Kuzmanov D. | Cozbinov A. | 2:0 (6:1, 7:5) | details | 05.01.2020 |
| | Norrie C. | Kuzmanov D. | 2:1 (6:2, 3:6, 6:2) | details | 03.01.2020 |
| World: Davis Cup - Group II - Singles - Main |
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| | Harris G. | Kuzmanov D. | 2:0 (6:3, 7:63) | details | 14.09.2019 |
| | Roelofse R. | Kuzmanov D. | 0:2 (5:7, 5:7) | details | 13.09.2019 |
 Finland: Tampere - Singles - Main |
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| 1/16-finals | Rola B. | Kuzmanov D. | 1:0 RET. (6:2, 2:1) | details | 23.07.2019 |
Italy: Parma 2 - Doubles - Main
Spain: Marbella - Doubles - Main