St. Petersburg 1 CH 2021 ATP
Final
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Zizou Bergs | m. | Altug Celikbilek | 6-4 3-6 6-4 |
Semifinal
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Zizou Bergs | m. | Vit Kopriva | 7-6(7) 6-2 |
| Altug Celikbilek | m. | Artem Dubrivnyy | 5-7 6-2 6-3 |
Perempat final
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Vit Kopriva | m. | Cem Ilkel | 7-5 6-2 |
| Zizou Bergs | m. | Lucas Catarina | 6-3 6-4 |
| Artem Dubrivnyy | m. | Andrey Kuznetsov | 6-3 6-7(8) 6-3 |
| Altug Celikbilek | m. | Jesper De Jong | 7-6(7) 6-0 |
Babak 16 besar
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Cem Ilkel | m. | Dominic Stricker | 6-7(5) 6-3 6-3 |
| Vit Kopriva | m. | Roberto Quiroz | 6-2 6-4 |
| Lucas Catarina | m. | Matthew Ebden | 7-6(4) 6-2 |
| Zizou Bergs | m. | Pavel Kotov | 6-0 7-5 |
| Andrey Kuznetsov | m. | Mirza Basic | 6-1 6-1 |
| Artem Dubrivnyy | m. | Viktor Durasovic | 7-5 3-6 6-3 |
| Altug Celikbilek | m. | Alexey Vatutin | 6-3 7-6(3) |
| Jesper De Jong | m. | Evgenii Tiurnev | 6-3 6-3 |
Babak 32 besar
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Cem Ilkel | m. | Shuichi Sekiguchi | 6-3 6-2 |
| Dominic Stricker | m. | Duje Ajdukovic | 5-7 6-4 6-2 |
| Vit Kopriva | m. | Ivan Gakhov | 7-5 1-6 7-6(7) |
| Roberto Quiroz | m. | Duck Hee Lee | 6-2 6-2 |
| Lucas Catarina | m. | Christopher Eubanks | 7-5 6-2 |
| Matthew Ebden | m. | Pedja Krstin | 6-1 6-4 |
| Zizou Bergs | m. | Harry Bourchier | 6-4 6-2 |
| Pavel Kotov | m. | Teymuraz Gabashvili | 6-4 6-2 |
| Mirza Basic | m. | Evgeny Karlovskiy | 6-0 6-4 |
| Andrey Kuznetsov | m. | Matija Pecotic | 7-6(0) 6-2 |
| Artem Dubrivnyy | m. | Igor Sijsling | 3-6 6-4 6-3 |
| Viktor Durasovic | m. | Rudolf Molleker | 7-6(2) 6-4 |
| Alexey Vatutin | m. | Nino Serdarusic | 6-4 3-6 6-0 |
| Altug Celikbilek | m. | Khumoun Sultanov | 6-4 6-1 |
| Jesper De Jong | m. | Uladzimir Ignatik | 6-4 4-6 6-3 |
| Evgenii Tiurnev | m. | Roman Safiullin | 7-5 6-4 |
Kualifikasi babak 2
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Lucas Catarina | m. | Alessandro Bega | 6-2 6-3 |
| Artem Dubrivnyy | m. | Skander Mansouri | 4-6 7-6(6) 6-0 |
| Zizou Bergs | m. | Ivan Nedelko | 6-2 6-1 |
| Andrey Kuznetsov | m. | Jiri Lehecka | 6-3 6-1 |
Kualifikasi babak 1
| Pemenang | Kalah | Skor | |
|---|---|---|---|
| Lucas Catarina | m. | Benjamin Hassan | 6-4 6-4 |
| Alessandro Bega | m. | Alexey Zakharov | 6-4 6-2 |
| Skander Mansouri | m. | Daniil Glinka | 3-6 7-6(4) 7-5 |
| Artem Dubrivnyy | m. | Konstantin Kravchuk | 7-6(3) 6-4 |
| Zizou Bergs | m. | Nerman Fatic | 6-4 6-2 |
| Ivan Nedelko | m. | Daniil Golubev | 6-0 6-0 |
| Andrey Kuznetsov | m. | Jonas Forejtek | 6-1 6-7(5) 7-5 |
| Jiri Lehecka | m. | Ergi Kirkin | 7-6(4) 7-5 |
Data: Jeff Sackmann / Tennis Abstract — CC BY-NC-SA 4.0