The 2023 Danube Upper Austria 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 second edition of the tournament which was part of the

2023 ATP Challenger Tour The Association of Tennis Professionals (ATP) ATP Challenger Tour, Challenger Tour in 2023 in tennis, 2023 was the secondary professional tennis circuit organized by the ATP. The 2023 ATP Challenger Tour calendar comprised 196 tournaments, with pr ...

. It took place in

Mauthausen Mauthausen was a German Nazi concentration camp on a hill above the market town of Mauthausen (roughly east of Linz), Upper Austria. It was the main camp of a group with nearly 100 further subcamps located throughout Austria and southern ...

, Austria between 8 and 14 May 2023.

Singles main-draw entrants

Seeds

* ¹ Rankings as of 24 April 2023.

Other entrants

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

Gerald Melzer Gerald Melzer (born 13 July 1990) is an Austrian professional inactive tennis player who competed mainly on the ATP Challenger Tour. He achieved a career-high singles ranking of world No. 68 in November 2016. Gerald is also part of Austrian Da ...

Lukas Neumayer Lukas Neumayer (born 6 September 2002) is an Austrian tennis player. Neumayer has a career high ATP singles ranking of world No. 166 achieved on 9 June 2025. He also has a career high ATP doubles ranking of No. 492 achieved on 18 July 2022. Car ...

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

Manuel Guinard Manuel Guinard (born 15 November 1995) is a French professional tennis player. He achieved a career-high ATP doubles ranking of world No. 36 on 14 April 2025 and a career-high singles ranking of world No. 134 on 31 October 2022. Guinard won his ...

Alexandar Lazarov Alexandar Lazarov (, born 6 November 1997) is a Bulgarian professional tennis player. His career-high singles ranking is world No. 272 achieved on 14 November 2022 and his best doubles ranking is No. 359 achieved on 3 February 2020. Professiona ...

* James McCabe *

Louis Wessels Louis Wessels (; born 27 August 1998) is a German tennis player. He has a career-high ATP singles ranking of world No. 267, achieved in July 2022. Tennis career On the junior tour, Wessels has a career high ITF junior ranking of 17 achieved i ...

The following players received entry from the qualifying draw: *

Mirza Bašić Mirza Bašić (; born 12 July 1991) is a Bosnian professional tennis player. He has won one ATP singles title at the 2018 Sofia Open and is a member of the Bosnia and Herzegovina Davis Cup team. Career Bašić reached his first Grand Slam ...

Marius Copil Marius Copil (born 17 October 1990) is a Romanian professional tennis player, competing currently on the ATP Challenger Tour. His career-high singles ranking is No. 56 achieved on 28 January 2019. Copil is known for his Fastest recorded tennis s ...

* Lucas Gerch *

Hendrik Jebens Hendrik Jebens (born 8 August 1995) is a German professional tennis player who specializes in doubles. He has a career high ATP doubles ranking of world No. 45, achieved on 5 August 2024. He has won eight ATP Challenger doubles titles, seven wit ...

* Matthias Ujvary *

Damien Wenger Damien Wenger (born 17 March 2000) is a Swiss tennis player. He has a career high ATP singles ranking of world No. 363 achieved on 22 May 2023 and a doubles ranking of No. 235 achieved on 15 April 2024. Career Wenger made his ATP main draw debu ...

Champions

Singles

Hamad Međedović Hamad Medjedovic ( sr-Cyrl-Latn, Хамад Међедовић, Hamad Međedović, separator=" / "; ; born 18 July 2003) is a Serbian professional tennis player. On 21 April 2025, Medjedovic reached his career-high ATP singles ranking of world ...

def.

Filip Misolic Filip Misolic (, ; born 8 August 2001) is an Austrian tennis player. He has a career high ATP singles ranking of world No. 126, achieved on 24 April 2023. He is currently the No. 2 Austrian player. Early life Misolic was born in Graz, Austria to ...

6–2, 6–7^(5–7), 6–4.

Doubles

Romain Arneodo Romain Arneodo (born 4 August 1992) is a French-born Monégasque professional tennis player who specializes in doubles.(in FrenchRomain Arneodo pourra représenter Monaco en Coupe Davis sur ''codesport.fr'', 30 septembre 2013 He has a career-hig ...

Sam Weissborn Tristan-Samuel Weissborn (born 24 October 1991) is an Austrian professional tennis player who specializes in doubles. Weissborn has been ranked by the Association of Tennis Professionals (ATP) as high as world No. 50 in doubles, which he achiev ...

def.

Constantin Frantzen Constantin Frantzen (born 16 March 1998) is a German tennis player who specializes in doubles. Frantzen has a career high ATP doubles ranking of world No. 45, achieved on 12 August 2024. He has won seven ATP Challenger doubles titles, all with ...

6–4, 6–2.

References

{{DEFAULTSORT:Upper Austria Open, 2023 2023 ATP Challenger Tour 2023 in Austrian sport Upper Austria Open May 2023 sports events in Austria