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 The ATP Challenger Tour (known until the end of 2008 as the ATP Challenger Series) is a series of international men's professional tennis tournaments. It was founded in 1976 as a replacement for the ILTF Satellite Circuit (founded in 1971) as ...

doubles titles, all with partner

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 ...

. He played college tennis at

Baylor University Baylor University is a Private university, private Baptist research university in Waco, Texas, United States. It was chartered in 1845 by the last Congress of the Republic of Texas. Baylor is the oldest continuously operating university in Te ...

Career

2023–2024: ATP and Grand Slam debuts in doubles

Frantzen made his

ATP Tour The ATP Tour (known as ATP World Tour between January 2009 and December 2018) is the sole worldwide top-tier tennis tour for men organized by the Association of Tennis Professionals (ATP) founded in 1990 that replaced the earlier dual Grand Prix ...

doubles main draw debut at the Swiss Open Gstaad alongside

. He reached his first ATP Tour final at the

Moselle Open The Moselle Open (Open de Moselle from 2003 to 2010) is a professional tennis tournament held in the city of Metz and played on indoor hardcourts. It is part of the ATP Tour 250 series of the ATP Tour from 2003. The venue for the tournament is cu ...

with partner Jebens, but lost to

Hugo Nys Hugo Nys (; born 16 February 1991) is a Monégasque professional tennis player who previously represented France until 2019. A doubles specialist, he reached his highest ATP doubles ranking of No. 12 on 12 June 2023 and singles ranking of No. 3 ...

and

Jan Zieliński Jan Zieliński (Polish: ; born 16 November 1996) is a Polish professional tennis player who specializes in doubles. He has an ATP career-high doubles ranking of world No. 7, which he attained on 19 June 2023. His highest ranking in singles has b ...

. Frantzen reached his second ATP Tour final at the 2024 Generali Open Kitzbühel also alongside Jebens but lost to

Alexander Erler Alexander Erler (; born 27 October 1997) is an Austrian professional tennis player. He has a career high ATP doubles ranking of world No. 32, achieved on 8 May 2023. He has a career high singles ranking of No. 322, achieved on 4 October 2021. ...

and

Andreas Mies Andreas Mies (; born 21 August 1990) is a German professional tennis player who specializes in doubles. He is a two-time Grand Slam champion, having won the French Open doubles title in both 2019 and 2020 alongside compatriot Kevin Krawietz. The ...

. The pair also made it to the 2024 Hangzhou Open final, losing to

Jeevan Nedunchezhiyan Jeevan Nedunchezhiyan (born 20 October 1988) is an Indian professional tennis player. He has a career-high ATP doubles ranking of No. 64 achieved on 18 March 2019. He won the doubles title with Rohan Bopanna at the 2017 Chennai Open, in a his ...

and

Vijay Sundar Prashanth Vijay SP Natarajan (born 27 October 1986) is an Indian professional tennis player. He has a career-high ATP doubles ranking of No. 80 achieved on 29 January 2024. He also has a career-high ATP singles ranking of No. 335 achieved on 5 October ...

in the final.

Doubles performance timeline

''Current through the 2025 Stuttgart Open.''

ATP Tour finals

Doubles: 3 (3 runner-ups)

ATP Challenger finals

Doubles: 16 (8 titles, 8 runner-ups)

ITF World Tennis Tour finals

Doubles: 11 (5–6)

References

External links

* * {{DEFAULTSORT:Frantzen, Constantin 1998 births Living people German male tennis players Sportspeople from Düsseldorf Tennis players from Düsseldorf (region) Baylor Bears men's tennis players German expatriate tennis players in the United States 21st-century German sportsmen