The 2026 Ostra Group Open was a professional tennis tournament played on clay courts. It was the 23rd edition of the tournament which was part of the 2026 ATP Challenger Tour. It took place in Ostrava, Czech Republic between 27 April and 3 May 2026.
Singles main-draw entrants Seeds Country Player Rank1 SeedDalibor Svrčina1271Jack Pinnington Jones1352Zsombor Piros1483Toby Samuel1634Ugo Blanchet1665Zdeněk Kolář1826Marco Cecchinato1887Vitaliy Sachko1918 1 Rankings are as of 20 April 2026.
Other entrants The following players received wildcards into the singles main draw: Hynek Bartoň Jan Jermář Maxim Mrva
The following player received entry into the singles main draw through the Junior Accelerator programme: Max Schönhaus
The following players received entry into the singles main draw as alternates: Filip Cristian Jianu Daniel Michalski Nikolás Sánchez Izquierdo
The following players received entry from the qualifying draw: Jonáš Forejtek Norbert Gombos Garrett Johns Rudolf Molleker Carlos Sánchez Jover Daniel Siniakov
Champions Singles
Nikolás Sánchez Izquierdo def. Zdeněk Kolář 6–4, 7–6(7–4).
Doubles
Sergio Martos Gornés / Szymon Walków def. Karol Drzewiecki / Piotr Matuszewski 6–7(3–7), 7–5, [10–8].
References