2023 Ostra Group Open

The 2023 Ostra Group Open was a professional tennis tournament played on clay courts. It was the 20th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Ostrava, Czech Republic between 24 and 30 April 2023.

2023 Ostra Group Open
Date	24 – 30 April
Edition	20th
Surface	Clay
Location	Ostrava, Czech Republic
Champions
Singles
Zdeněk Kolář
Doubles
Robert Galloway / Miguel Ángel Reyes-Varela

Singles main-draw entrants

Seeds

Country	Player	Rank1	Seed
GBR	Ryan Peniston	158	1
	Ivan Gakhov	162	2
CZE	Vít Kopřiva	165	3
FRA	Geoffrey Blancaneaux	175	4
CHI	Alejandro Tabilo	176	5
ITA	Riccardo Bonadio	179	6
UKR	Oleksii Krutykh	180	7
BIH	Damir Džumhur	202	8
CZE	Dalibor Svrčina	203	9

• ¹ Rankings are as of 17 April 2023.

Other entrants

The following players received wildcards into the singles main draw:

• Jakub Menšík
• Gaël Monfils
• Jiří Veselý

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

• Shintaro Mochizuki
• Vitaliy Sachko

The following players received entry from the qualifying draw:

• Guido Andreozzi
• Àlex Martí Pujolràs
• Rudolf Molleker
• Patrik Rikl
• Henri Squire
• Khumoyun Sultanov

Champions

Singles

Main article: 2023 Ostra Group Open – Singles

• Zdeněk Kolář def. Máté Valkusz 6–3, 6–2.

Doubles

Main article: 2023 Ostra Group Open – Doubles

• Robert Galloway / Miguel Ángel Reyes-Varela def. Guido Andreozzi / Guillermo Durán 7–5, 7–6^(7–5).