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. 99, achieved on 19 June 2023. 

Frantzen played college tennis at Baylor University.

He has won one ATP Challenger doubles title at the 2023 Challenger Biel/Bienne with Hendrik Jebens.

He made his ATP Tour doubles main draw debut at the 2023 Swiss Open Gstaad, also with Jebens.

ATP Challenger and ITF World Tennis Tour finals

Doubles: 21 (8–12)

References

External links
 
 

1998 births
Living people
German male tennis players
Sportspeople from Düsseldorf
Baylor Bears men's tennis players