See main article: 2021 Saint Petersburg Challenger.
This was the first edition of the tournament.[1]
Zizou Bergs won the title after defeating Altuğ Çelikbilek 6–4, 3–6, 6–4 in the final.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "2021 Saint Petersburg Challenger – Singles".
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