St. Petersburg 2 CH 2021 ATP
Final
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Evgenii Tiurnev | m. | Kacper Zuk | 6-4 6-2 |
Semifinal
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Kacper Zuk | m. | Jiri Lehecka | 7-6(7) 6-3 |
| Evgenii Tiurnev | m. | Marius Copil | 7-6(4) 6-2 |
Perempat final
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Jiri Lehecka | m. | Dmitry Popko | 6-4 6-4 |
| Kacper Zuk | m. | Jack Sock | 6-3 6-2 |
| Marius Copil | m. | Christopher Eubanks | 7-6(1) 7-5 |
| Evgenii Tiurnev | m. | Mirza Basic | 6-4 6-2 |
Babak 16 besar
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Dmitry Popko | m. | Denis Yevseyev | 6-4 2-6 6-4 |
| Jiri Lehecka | m. | Rudolf Molleker | 6-2 6-3 |
| Jack Sock | m. | Pavel Kotov | 6-4 6-3 |
| Kacper Zuk | m. | Zizou Bergs | 1-6 6-4 6-3 |
| Christopher Eubanks | m. | Duje Ajdukovic | 6-3 6-3 |
| Marius Copil | m. | Alexey Vatutin | 5-7 6-3 6-1 |
| Evgenii Tiurnev | m. | Altug Celikbilek | 6-3 2-6 6-3 |
| Mirza Basic | m. | Roberto Ortega Olmedo | 6-1 7-6(3) |
Babak 32 besar
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Dmitry Popko | m. | Nino Serdarusic | 6-4 6-4 |
| Denis Yevseyev | m. | Vaja Uzakov | 6-0 6-0 |
| Jiri Lehecka | m. | Matija Pecotic | 6-2 7-6(4) |
| Rudolf Molleker | m. | Evgeny Karlovskiy | 6-3 7-5 |
| Jack Sock | m. | Cem Ilkel | 5-7 6-4 6-4 |
| Pavel Kotov | m. | Tim Van Rijthoven | 6-2 6-4 |
| Zizou Bergs | m. | Pedja Krstin | 6-2 6-1 |
| Kacper Zuk | m. | Igor Sijsling | 6-4 6-3 |
| Christopher Eubanks | m. | Jesper De Jong | 7-5 6-4 |
| Duje Ajdukovic | m. | Shuichi Sekiguchi | 7-5 6-2 |
| Alexey Vatutin | m. | Duck Hee Lee | 0-6 6-1 6-1 |
| Marius Copil | m. | Michael Vrbensky | 6-3 6-1 |
| Altug Celikbilek | m. | Teymuraz Gabashvili | 6-2 6-2 |
| Evgenii Tiurnev | m. | Vit Kopriva | 6-4 6-2 |
| Roberto Ortega Olmedo | m. | Roberto Quiroz | 6-3 6-3 |
| Mirza Basic | m. | Roman Safiullin | 6-4 7-6(7) |
Kualifikasi babak 2
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Jiri Lehecka | m. | Jelle Sels | 6-4 6-3 |
| Tim Van Rijthoven | m. | Khumoun Sultanov | 6-2 6-1 |
| Matija Pecotic | m. | Alessandro Bega | 6-3 6-3 |
| Mirza Basic | m. | Aleksandr Nedovyesov | 6-4 6-2 |
Kualifikasi babak 1
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Jelle Sels | m. | Andrey Kuznetsov | 6-4 6-3 |
| Jiri Lehecka | m. | Ivan Nedelko | 6-1 6-3 |
| Tim Van Rijthoven | m. | Konstantin Kravchuk | 6-4 6-4 |
| Khumoun Sultanov | m. | Daniil Glinka | 7-6(4) 6-4 |
| Matija Pecotic | m. | Uladzimir Ignatik | 0-6 7-6(3) 6-4 |
| Alessandro Bega | m. | Harry Bourchier | 6-2 6-3 |
| Aleksandr Nedovyesov | m. | Daniil Golubev | 6-1 6-0 |
| Mirza Basic | m. | Viktor Durasovic | 7-5 6-4 |
Data: Jeff Sackmann / Tennis Abstract — CC BY-NC-SA 4.0