St. Petersburg II Challenger, 2021, Challenger 80
| Basic, Mirza (Q) | [BIH] | |
| Basic, Mirza (Q) | ||
| Ortega-Olmedo, Roberto | [ESP] | 61 76(3) |
| Tiurnev, Evgenii (WC) | [RUS] | |
| Tiurnev, Evgenii (WC) | ||
| Celikbilek, Altug | [TUR] | 63 26 63 |
| Copil, Marius[4] | [ROU] | |
| Copil, Marius[4] | ||
| Vatutin, Alexey | [RUS] | 57 63 61 |
| Ajdukovic, Duje | [CRO] | |
| Eubanks, Christopher[7] | ||
| Eubanks, Christopher[7] | [USA] | 63 63 |
| Zuk, Kacper[6] | [POL] | |
| Zuk, Kacper[6] | ||
| Bergs, Zizou (SE) | [BEL] | 16 64 63 |
| Kotov, Pavel | [RUS] | |
| Sock, Jack | ||
| Sock, Jack | [USA] | 64 63 |
| Molleker, Rudolf[5] | [GER] | |
| Lehecka, Jiri (Q) | ||
| Lehecka, Jiri (Q) | [CZE] | 62 63 |
| Yevseyev, Denis (WC) | [KAZ] | |
| Popko, Dmitry[2] | ||
| Popko, Dmitry[2] | [KAZ] | 64 26 64 |
| Basic, Mirza (Q) | [BIH] | |
| Tiurnev, Evgenii (WC) | ||
| Tiurnev, Evgenii (WC) | [RUS] | 64 62 |
| Copil, Marius[4] | [ROU] | |
| Copil, Marius[4] | ||
| Eubanks, Christopher[7] | [USA] | 76(1) 75 |
| Zuk, Kacper[6] | [POL] | |
| Zuk, Kacper[6] | ||
| Sock, Jack | [USA] | 63 62 |
| Lehecka, Jiri (Q) | [CZE] | |
| Lehecka, Jiri (Q) | ||
| Popko, Dmitry[2] | [KAZ] | 64 64 |
| Tiurnev, Evgenii (WC) | [RUS] | |
| Tiurnev, Evgenii (WC) | ||
| Copil, Marius[4] | [ROU] | 76(4) 62 |
| Zuk, Kacper[6] | [POL] | |
| Zuk, Kacper[6] | ||
| Lehecka, Jiri (Q) | [CZE] | 76(7) 63 |
| Tiurnev, Evgenii (WC) | [RUS] | |
| Tiurnev, Evgenii (WC) | ||
| Zuk, Kacper[6] | [POL] | 64 62 |
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