Belgrade 2 2021 ATP
Final
| Winner | Loser | Score | |
|---|---|---|---|
| Novak Djokovic | d. | Alex Molcan | 6-4 6-3 |
Semifinals
| Winner | Loser | Score | |
|---|---|---|---|
| Alex Molcan | d. | Federico Delbonis | 4-6 6-4 6-4 |
| Novak Djokovic | d. | Andrej Martin | 6-1 4-6 6-0 |
Quarterfinals
| Winner | Loser | Score | |
|---|---|---|---|
| Federico Delbonis | d. | Roberto Carballes Baena | W/O |
| Alex Molcan | d. | Fernando Verdasco | 6-2 6-0 |
| Andrej Martin | d. | Dusan Lajovic | 3-6 6-3 6-4 |
| Novak Djokovic | d. | Federico Coria | 6-1 6-0 |
Round of 16
| Winner | Loser | Score | |
|---|---|---|---|
| Roberto Carballes Baena | d. | Gael Monfils | 6-1 3-6 7-6(4) |
| Federico Delbonis | d. | Thiago Monteiro | 7-6(6) 3-6 6-4 |
| Fernando Verdasco | d. | Adrian Mannarino | 7-6(4) 6-0 |
| Alex Molcan | d. | Pedja Krstin | 6-0 6-0 |
| Dusan Lajovic | d. | Jeremy Chardy | 6-3 6-4 |
| Andrej Martin | d. | Nikoloz Basilashvili | 6-1 4-6 7-6(4) |
| Federico Coria | d. | Pablo Cuevas | 6-3 6-2 |
| Novak Djokovic | d. | Mats Moraing | 6-2 7-6(4) |
Round of 32
| Winner | Loser | Score | |
|---|---|---|---|
| Roberto Carballes Baena | d. | Arthur Rinderknech | 6-0 6-4 |
| Thiago Monteiro | d. | Radu Albot | 6-2 6-2 |
| Federico Delbonis | d. | Lukas Klein | 3-6 6-3 6-4 |
| Fernando Verdasco | d. | Lucas Pouille | 7-5 6-2 |
| Pedja Krstin | d. | Soon Woo Kwon | 6-2 3-6 6-1 |
| Alex Molcan | d. | Hamad Medjedovic | 6-4 6-3 |
| Dusan Lajovic | d. | Ricardas Berankis | 6-3 6-3 |
| Jeremy Chardy | d. | Tennys Sandgren | 6-4 6-2 |
| Andrej Martin | d. | Christopher Oconnell | 3-6 7-6(7) 7-5 |
| Pablo Cuevas | d. | Miomir Kecmanovic | 6-3 6-2 |
| Federico Coria | d. | Marko Topo | 4-6 6-2 6-0 |
| Mats Moraing | d. | Egor Gerasimov | 4-6 7-6(7) 7-5 |
Qualifying round 2
| Winner | Loser | Score | |
|---|---|---|---|
| Christopher Oconnell | d. | Lukas Klein | 7-6(7) 7-5 |
| Andrej Martin | d. | Mats Moraing | 6-1 6-3 |
| Roberto Carballes Baena | d. | Vit Kopriva | 6-4 6-4 |
| Alex Molcan | d. | Carlos Gomez Herrera | 6-3 7-6(8) |
Qualifying round 1
| Winner | Loser | Score | |
|---|---|---|---|
| Lukas Klein | d. | Marko Tepavac | 6-4 6-1 |
| Christopher Oconnell | d. | Darian King | 6-1 6-3 |
| Mats Moraing | d. | Malek Jaziri | 6-3 6-4 |
| Andrej Martin | d. | Akira Santillan | 6-3 6-3 |
| Vit Kopriva | d. | Alexey Vatutin | 6-3 3-6 6-4 |
| Roberto Carballes Baena | d. | Mirza Basic | 6-2 6-3 |
| Alex Molcan | d. | Nerman Fatic | 6-4 6-1 |
| Carlos Gomez Herrera | d. | John Patrick Smith | 6-4 7-6(5) |