2021 Banja Luka Challenger – Singles
Tallon Griekspoor was the defending champion but chose not to defend his title. Juan Manuel Cerúndolo won the title after defeating Nikola Milojević 6–3, 6–1 in the final. Seeds

Draw

Finals

Top half

Bottom half

References

External links
Main draw
Qualifying draw

Banja Luka Challenger - 1
2021 Singles