See main article: 2021 Sparkassen ATP Challenger.
Ilya Ivashka was the defending champion[1] but chose not to defend his title.
Oscar Otte won the title after defeating Maxime Cressy 7–6(7–5), 6–4 in the final.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "2021 Sparkassen ATP Challenger – Singles".
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