2025 NÖ Open
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The 2025 NÖ Open was a professional tennis tournament played on clay courts. It was the fifth edition of the tournament which was part of the 2025 ATP Challenger Tour. It took place in Tulln an der Donau, Austria between 1 and 7 September 2025.
Singles main-draw entrants
Seeds
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| GBR | Jan Choinski | 150 | 1 |
| ITA | Francesco Maestrelli | 155 | 2 |
| AUT | Lukas Neumayer | 157 | 3 |
| ARG | Marco Trungelliti | 183 | 4 |
| ARG | Santiago Rodríguez Taverna | 207 | 5 |
| UKR | Vitaliy Sachko | 217 | 6 |
| SUI | Dominic Stricker | 226 | 7 |
| ARG | Alex Barrena | 228 | 8 |
- 1 Rankings are as of 25 August 2025.
Other entrants
The following players received wildcards into the singles main draw:
- Austria Sandro Kopp
- Austria Neil Oberleitner
- Austria Joel Schwärzler
The following player received entry into the singles main draw using a protected ranking:
The following player received entry into the singles main draw through the Next Gen Accelerator programme:
The following players received entry from the qualifying draw:
- Czech Republic Zdeněk Kolář
- Slovakia Jozef Kovalík
- Germany Rudolf Molleker
- Czech Republic Maxim Mrva
- Czech Republic David Poljak
- Germany Kai Wehnelt
Champions
Singles
- Argentina Marco Trungelliti def. Czech Republic Andrew Paulson 7–5, 6–1.
Doubles
- Austria Neil Oberleitner / Austria Joel Schwärzler def. Ukraine Oleg Prihodko / Ukraine Vitaliy Sachko 5–7, 6–3, [10–7].