2023 Kozerki Open

Country	Player	Rank1	Seed
CZE	Tomáš Macháč	106	1
BEL	Joris De Loore	166	2
CZE	Zdeněk Kolář	169	3
AUS	Marc Polmans	173	4
NED	Jesper de Jong	178	5
SWE	Elias Ymer	179	6
NED	Jelle Sels	200	7
POR	Frederico Ferreira Silva	223	8

• ¹ Rankings were as of 7 August 2023.^[1]

The following players received wildcards into the singles main draw:

• Tomasz Berkieta
• Dali Blanch
• Martyn Pawelski

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

• Charles Broom
• Viktor Durasovic
• Peter Gojowczyk

The following players received entry from the qualifying draw:

• Marius Copil
• David Poljak
• Akira Santillan
• Adrià Soriano Barrera
• Jiří Veselý
• Denis Yevseyev

The following player received entry as a lucky loser:

• Stefanos Sakellaridis

• Jesper de Jong def. Benjamin Hassan 6–3, 6–3.

• Théo Arribagé / Luca Sanchez def. Anirudh Chandrasekar / Vijay Sundar Prashanth 6–4, 6–4.