The 2025

Ostra Group Open The Ostra Group Open, formerly known as Prosperita Open, is a professional tennis tournament played on outdoor red clay courts. It is currently part of the Association of Tennis Professionals (ATP) Challenger Tour. It has been held annually in O ...

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 22nd edition of the tournament which was part of the

2025 ATP Challenger Tour The Association of Tennis Professionals (ATP) ATP Challenger Tour, Challenger Tour in 2025 in tennis, 2025 is the secondary professional tennis circuit organized by the ATP. The 2025 ATP Challenger Tour calendar comprises 171 tournaments (as of 12 ...

. 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 28 April and 4 May 2025.

Singles main-draw entrants

Seeds

* ¹ Rankings are as of 21 April 2025.

Other entrants

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

Jan Jermář Jan Jermář (born 12 April 2000) is a Czech tennis player. Jermář has a career high ATP singles ranking of 1489 achieved on 16 September 2024. He also has a career high ATP doubles ranking of 309 achieved on 7 April 2025. Jermář has won o ...

Jan Kumstát Jan Kumstát (born 2 January 2007) is a Czech tennis player. He won the boys' doubles event at the 2025 Australian Open. Career In the summer of 2022 he won gold in the singles at the European Youth Olympic Festival in Banská Bystrica. He wa ...

Maxim Mrva Maxim Mrva (born 2 August 2007) is a Czech professional tennis player. He has a career-high ATP singles ranking of No. 552, achieved on 9 June 2025, and a doubles ranking of No. 932, achieved on 19 May 2025. He won the boys' doubles title at th ...

The following players received entry from the qualifying draw: * Petr Brunclík *

Norbert Gombos Norbert Gombos (, ; born 13 August 1990, occasionally spelled Norbert Gomboš) is a Slovak professional tennis player competing primarily on the ATP Challenger Tour. He achieved a career-high ATP singles ranking of World No. 80 on 2 October 20 ...

Max Houkes Max Houkes (born 3 July 2000) is a Dutch tennis player. He has a career high ATP singles ranking of world No. 245 achieved on 30 June 2025. He also has a career high doubles ranking of No. 344 achieved on 23 October 2023. Houkes has won three AT ...

* Àlex Martínez *

Rudolf Molleker Rudolf Molleker (born 26 October 2000) is a German tennis player. Molleker achieved a career high ATP singles ranking of world No. 146 on 29 July 2019 and a doubles ranking of world No. 376 on 21 March 2022. Personal information He was born in ...

Jelle Sels Jelle Sels (born 10 August 1995) is a Dutch tennis player. Sels competes mainly in the Challenger tour circuit. He has a career high ATP singles ranking of world No. 127 achieved on 28 November 2022. He also has a career high doubles ranking of ...

The following player received entry as a lucky loser: *

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 ...

Champions

Singles

Zsombor Piros Zsombor Piros (born 13 October 1999) is a Hungarian professional tennis player. Piros has a career-high Association of Tennis Professionals, ATP singles ranking of world No. 106, achieved on 4 March 2024. He also has a career-high ATP doubles ra ...

def.

Hady Habib Hady Habib (; born 21 August 1998) is an American-born Lebanese professional tennis player. He has a career high ATP singles ranking of world No. 159 achieved on 5 May 2025 and a doubles ranking of No. 274 achieved on 23 December 2024. Habib w ...

6–3, 6–2.

Doubles

Stefan Latinović Stefan Latinović ( sr-Cyrl, Стефан Латиновић; born 22 November 1999) is a Serbian professional tennis player. He achieved career-high ATP rankings of world No. 221 in doubles on 16 June 2025 and world No. 928 in singles on 14 Jul ...

def.

Finn Reynolds Finn Reynolds (born 4 January 2000) is a professional tennis player from New Zealand who specializes in doubles. Reynolds first represented New Zealand at the Davis Cup in 2021, where he lost his debut match to World No. 83 Kwon Soon-woo. Coll ...

James Watt James Watt (; 30 January 1736 (19 January 1736 OS) – 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1776, which was f ...

7–5, 6–3.

References

{{DEFAULTSORT:Ostra Group Open, 2025 2025 ATP Challenger Tour

2025 So far, the year has seen the continuation of major armed conflicts, including the Russian invasion of Ukraine, the Sudanese civil war (2023–present), Sudanese civil war, and the Gaza war. Internal crises in Bangladesh post-resignation v ...

2025 in Czech sport April 2025 sports events in Europe May 2025 sports events in the Czech Republic