The 2023 Ostra Group Open was a professional

tennis Tennis is a List of racket sports, racket sport that is played either individually against a single opponent (singles (tennis), singles) or between two teams of two players each (doubles (tennis), doubles). Each player uses a tennis racket st ...

tournament played on

clay court A clay court is one of the types of tennis court on which the sport of tennis is played. Clay courts are built on a foundation of crushed stone, brick, shale, and other construction aggregate, aggregate, with a thin layer of fine clay particles ...

s. It was the 20th edition of the tournament which was part of the

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. It took place in

Ostrava Ostrava (; ; ) is a city in the north-east of the Czech Republic and the capital of the Moravian-Silesian Region. It has about 283,000 inhabitants. It lies from the border with Poland, at the confluences of four rivers: Oder, Opava (river), Opa ...

Czech Republic The Czech Republic, also known as Czechia, and historically known as Bohemia, is a landlocked country in Central Europe. The country is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the south ...

between 24 and 30 April 2023.

Singles main-draw entrants

Seeds

* ¹ Rankings are as of 17 April 2023.

Other entrants

The following players received wildcards into the singles main draw: *

Jakub Menšík Jakub Menšík (; born 1 September 2005) is a Czech professional tennis player. He has a career-high ATP singles ranking of world No. 17, achieved on 9 June 2025, and a doubles ranking of No. 386, achieved on 3 February 2025. Menšík is current ...

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Jiří Veselý Jiří Veselý (; born 10 July 1993) is a Czech professional tennis player. He reached a career-high singles ranking of world No. 35 on 27 April 2015. Youth career Veselý reached the No. 1 junior combined world ranking in January 2011, co ...

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

Shintaro Mochizuki Shintaro Mochizuki (Japanese: 望月慎太郎, ''Mochizuki Shintarō'', born 2 June 2003) is a Japanese professional tennis player. He has an ATP career-high singles ranking of world No. 129 achieved on 6 November 2023 and a doubles ranking of ...

Vitaliy Sachko Vitaliy Sachko (; born 14 July 1997) is a Ukrainian tennis player. He has a career-high singles ranking of world No. 156, achieved on 31 July 2023 and a doubles ranking of No. 130, achieved on 9 June 2025. He is currently the No. 1 player from U ...

The following players received entry from the qualifying draw: *

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* Àlex Martí Pujolràs *

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Champions

Singles

Zdeněk Kolář Zdeněk Kolář (; born 9 October 1996) is a Czech tennis player. Kolář has a career high ATP singles ranking of World No. 111 achieved on 13 June 2022. He also has a career high doubles ranking of World No. 110 achieved on 1 August 2022. Pro ...

def.

Máté Valkusz Máté Valkusz (born 13 August 1998) is a Hungarian inactive professional tennis player. Valkusz has a career-high ATP singles ranking of No. 204, achieved on 12 June 2023. Juniors On the junior tour, Valkusz has a career high combined junior ...

6–3, 6–2.

Doubles

Robert Galloway Robert Galloway may refer to: * Robert Galloway (mining engineer) * Robert Galloway (tennis) Robert Galloway (born September 24, 1992) is an American professional tennis player who specializes in doubles. He has a career-high ATP doubles rank ...

Miguel Ángel Reyes-Varela Miguel Ángel Reyes-Varela Martínez (; born June 21, 1987) is a Mexican professional tennis player who specializes in doubles. He has a career-high ATP doubles ranking of world No. 49, achieved on 20 August 2018. In singles his best ranking is N ...

def.

Guillermo Durán Guillermo Durán (; born 6 June 1988) is an Argentine tennis player, who specializes in doubles. He competes mostly on the ATP Challenger Tour. His highest Association of Tennis Professionals, ATP doubles ranking of world No. 48 was achieved on ...

7–5, 7–6^(7–5).

References

{{DEFAULTSORT:Ostra Group Open, 2023 2023 ATP Challenger Tour

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2023 in Czech sport April 2023 sports events in Europe