2023 Banja Luka Challenger

Country	Player	Rank1	Seed
HUN	Fábián Marozsán	89	1
ITA	Marco Cecchinato	108	2
SVK	Alex Molčan	120	3
FRA	Benoît Paire	126	4
BEL	Kimmer Coppejans	160	5
ARG	Mariano Navone	168	6
CZE	Zdeněk Kolář	171	7
BIH	Damir Džumhur	172	8

• ¹ Rankings are as of 31 July 2023.^[1]

The following players received wildcards into the singles main draw:

• Marco Cecchinato
• Alex Molčan
• Andrej Nedić

The following players received entry into the singles main draw as special exempts:

• Ugo Blanchet
• Toby Kodat

The following player received entry into the singles main draw as an alternate:

• Kyrian Jacquet

The following players received entry from the qualifying draw:

• Mirza Bašić
• Akira Santillan
• Aldin Šetkić
• Marko Topo
• Eric Vanshelboim
• Miljan Zekić

• Dino Prižmić def. Kimmer Coppejans 6–2, 6–3.

• Victor Vlad Cornea / Philipp Oswald def. Andrey Golubev / Denys Molchanov 3–6, 6–1, [15–13].