See main article: 2021 Banja Luka Challenger.
Tallon Griekspoor was the defending champion[1] but chose not to defend his title.
Juan Manuel Cerúndolo won the title after defeating Nikola Milojević 6–3, 6–1 in the final.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "2021 Banja Luka Challenger – Singles".
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