Constantin Frantzen Explained

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.^[1] He has won seven ATP Challenger doubles titles, all with partner Hendrik Jebens.

He played college tennis at Baylor University.^[2]

Career

2023–2024: ATP and Grand Slam debuts in doubles

Frantzen made his ATP Tour doubles main draw debut at the Swiss Open Gstaad alongside Hendrik Jebens.

He reached his first ATP Tour final at the Moselle Open with partner Jebens, but lost to Hugo Nys and Jan Zieliński.^[3] Frantzen reached his second ATP Tour final at the 2024 Generali Open Kitzbühel also alongside Jebens but lost to Alexander Erler and Andreas Mies.^[4] The pair also made it to the 2024 Hangzhou Open final, losing to Jeevan Nedunchezhiyan and Vijay Sundar Prashanth in the final.^[5]

Doubles performance timeline

Current through the 2024 ATP Tour.

Tournament	2023	2024	2025	SR	width=38	W–L
Grand Slam tournaments
Australian Open	A	1R		0 / 1	0–1
French Open	A	1R		0 / 1	0–1
Wimbledon	A	QF		0 / 1	3–1
US Open	A	1R		0 / 1	0–1
style=text-align:left	Win–loss	0–0	3–4		0 / 4	3–4
Career statistics
Tournaments	5	20		25
style=text-align:left	Titles	0	0		0
style=text-align:left	Finals	1	2		3
style=text-align:left	Overall win–loss	3–5	19–20		22–25
Year-end ranking	65	52

ATP Tour finals

Doubles: 3 (3 runner-ups)

Legend Grand Slam tournaments (0–0) ATP Masters 1000 (0–0) ATP 500 (0–0) ATP 250 (0–3)

Finals by surface Hard (0–2) Clay (0–1) Grass (0–0)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1		Moselle Open, France	ATP 250	Hard (i)	Hendrik Jebens	Hugo Nys Jan Zieliński	4–6, 4–6
Loss	0–2		Austrian Open Kitzbühel, Austria	ATP 250	Clay	Hendrik Jebens	Alexander Erler Andreas Mies	3–6, 6–3, [6–10]
Loss	0–3		Hangzhou Open, China	ATP 250	Hard	Hendrik Jebens	Jeevan Nedunchezhiyan Vijay Sundar Prashanth	6–4, 6–7(5–7), [7–10]

ATP Challenger finals

Doubles: 15 (7–8)

Finals by surface
Hard (2–5)
Clay (5–2)
Carpet (0–1)

Result	W–L	Date	Tournament	Surface	Partner	Opponents	Score
Loss	0–1		Columbus, United States	Hard	Charles Broom	Julian Cash Henry Patten	2–6, 5–7
Loss	0–2		Las Vegas, United States	Hard	Reese Stalder	Julian Cash Henry Patten	4–6, 6–7(1–7)
Loss	0–3		Pau, France	Hard (i)	Julian Cash	Dan Added Albano Olivetti	6–3, 1–6, [8–10]
Loss	0–4		Lugano, Switzerland	Hard (i)	Hendrik Jebens	Zizou Bergs David Pel	2–6, 6–7(6–8)
Win	1–4		Biel/Bienne, Switzerland	Hard (i)	Hendrik Jebens	Victor Vlad Cornea Franko Škugor	6–2, 6–4
Loss	1–5		bgcolor=moccasin	Mauthausen, Austria	Clay	Hendrik Jebens	Romain Arneodo Sam Weissborn	4–6, 2–6
Win	2–5		bgcolor=moccasin	Heilbronn, Germany	Clay	Hendrik Jebens	Victor Vlad Cornea Philipp Oswald	7–6(9–7), 6–4
Loss	2–6		bgcolor=moccasin	Lyon, France	Clay	Hendrik Jebens	Manuel Guinard Grégoire Jacq	4–6, 6–2, [7–10]
Win	3–6		bgcolor=moccasin	Augsburg, Germany	Clay	Hendrik Jebens	Constantin Bittoun Kouzmine Volodymyr Uzhylovskyi	6–2, 6–2
Win	4–6		bgcolor=moccasin	Como, Italy	Clay	Hendrik Jebens	Filip Bergevi Mick Veldheer	6–3, 6–4
Win	5–6		bgcolor=moccasin	Bad Waltersdorf, Austria	Clay	Hendrik Jebens	Marco Bortolotti Francesco Passaro	6–1, 6–2
Win	6–6		bgcolor=moccasin	Orléans, France	Hard (i)	Hendrik Jebens	Henry Patten John-Patrick Smith	7–6(7–5), 7–6(14–12)
Loss	6–7		bgcolor=moccasin	Ismaning, Germany	Carpet (i)	Hendrik Jebens	Sriram Balaji Andre Begemann	6–7(4–7), 4–6
Loss	6–8		bgcolor=moccasin	Lugano, Switzerland	Hard (i)	Hendrik Jebens	Sander Arends Sem Verbeek	7–6(11–9), 6–7(1–7), [8–10]
Win	7–8		bgcolor=moccasin	Mauthausen, Austria	Clay	Hendrik Jebens	Ryan Seggerman Patrik Trhac	6–4, 6–4

ITF World Tennis Tour finals

Doubles: 11 (5–6)

Finals by surface
Hard (1–4)
Clay (3–2)
Carpet (1–0)

Result	W–L	Date	Tournament	Surface	Partner	Opponents	Score
Win	1–0		Ismaning, Germany	Carpet (i)	Alexander Erler	Kevin Krawietz Tim Sandkaulen	2–6, 7–5(7–5), [10–8]
Loss	1–1		M15 Lubbock, United States	Hard	Sven Lah	Sekou Bangoura Gijs Brouwer	4–6, 6–4, [5–10]
Loss	1–2		M25 Harlingen, United States	Hard	Gabi Adrian Boitan	Francis Alcantara Mark Whitehouse	6–7(3–7), 7–5, [7–10]
Loss	1–3		M25 Glasgow, United Kingdom	Hard (i)	Charles Broom	Gijs Brouwer Aidan McHugh	6–4, 6–7(1–7), [4–10]
Loss	1–4		M15 Monastir, Tunisia	Hard	Tim Sandkaulen	Szymon Kielan Michał Mikuła	6–7(4–7), 7–6(7–2), [2–10]
Win	2–4		M15 Monastir, Tunisia	Hard	Charles Broom	Li Zhe Bu Yunchaokete	7–5, 2–6, [10–8]
Win	3–4		M15 Meerbusch, Germany	Clay	Tim Sandkaulen	Miguel Fernando Pereira Gabriel Roveri Sidney	7–6(7–5), 6–4
Win	4–4		M25 Most, Czech Republic	Clay	Tim Sandkaulen	Marek Gengel David Poljak	6–3, 4–6, [10–7]
Loss	4–5		M25 Arlon, Belgium	Clay	Tim Sandkaulen	Anirudh Chandrasekar Vijay Sundar Prashanth	6–7(5–7), 4–6
Win	5–5		M25 Kassel, Germany	Clay	Tim Sandkaulen	Tom Gentzsch Leopold Zima	6–4, 6–2
Loss	5–6		M25 Wetzlar, Germany	Clay	Tim Sandkaulen	Benjamin Hassan Tristan Lamasine	4–6, 3–6

Notes and References

1. Web site: Constantin Frantzen - Overview. ATP Tour.
2. Web site: Constantin Frantzen – Men's Tennis. Baylor University Athletics.
3. Web site: Escobar/Nedovyesov Win Sofia Doubles Title; Nys/Zielinski Retain Metz Crown. ATP Tour. 11 November 2023.
4. Web site: First-time partners & last-minute sign in, Erler/Mies win Kitzbühel crown. ATPTour. 24 September 2024.
5. Web site: Hangzhou Open 2024 tennis: Jeevan Nedunchezhiyan-Vijay Sundar Prashanth win doubles title. olympics.com. 24 September 2024.