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TennisATPLeft-handed

Bradley Klahn

United StatesAge, ranking and results

Bradley Klahn, a left-handed tennis player who represented the United States, reached a career-high ATP Tour ranking of No. 63.

59ATP Tour matches

Updated Oct 5, 2026, 3:12 PM ET

Titles0 Grand Slam titles0 Career highNo. 63Mar 17, 2014 Agatha's recordNone yetno graded calls on him yet

About Bradley Klahn

Bradley Klahn, a left-handed tennis player who represented the United States, was born on August 20, 1990, in Poway, California. He turned pro in 2012 and reached a career-high ATP Tour ranking of No. 63 on March 17, 2014. Klahn retired in 2023.

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Agatha Research DeskUpdated Oct 5, 2026

Match history59

Every ATP Tour, Grand Slam and Olympic main-draw match in our records, newest first. A walkover is listed but never counted in a record.

2023: 3-6

Date	Tournament	Round	Opponent	Result	Score	Surface
Jul 31	Mubadala DC Open	Round 1	Michael Mmoh	L	3-6, 3-6	Hard
Jul 30	Mubadala DC Open	Qualifying Final	Sho Shimabukuro	W	7-5, 6-4	Hard
Jul 29	Mubadala DC Open	Qualifying 1st Round	James Trotter	W	6-4, 7-6(4)	Hard
Jul 22	Atlanta Open	Qualifying 1st Round	Gabriel Diallo	L	3-6, 2-6	Hard
Mar 20	Miami Open	Qualifying 1st Round	Tomas Machac	L	4-6, 4-6	Hard
Mar 6	Indian Wells	Qualifying 1st Round	Alexei Popyrin	L	4-6, 6-7(3)	Hard
Feb 25	Abierto Mexicano Telcel presentado por HSBC	Qualifying 1st Round	Elias Ymer	L	4-6, 4-6	Hard
Jan 10	Australian Open	Qualifying 2nd Round	Enzo Couacaud	L	3-6, 6-4, 4-6	Hard
Jan 9	Australian Open	Qualifying 1st Round	Frederico Ferreira Silva	W	6-3, 7-6(5)	Hard

2022: 1-8

Date	Tournament	Round	Opponent	Result	Score	Surface
Sep 17	Cymbiotika San Diego Open	Qualifying 1st Round	Ernesto Escobedo	L	6-3, 6-7(6), 2-6	Hard
Aug 24	US Open	Qualifying 1st Round	Jan-Lennard Struff	L	4-6, 6-4, 2-6	Hard
Aug 14	Cincinnati Open	Qualifying Final	Lorenzo Sonego	L	2-6, 4-6	Hard
Aug 13	Cincinnati Open	Qualifying 1st Round	Alexei Popyrin	W	7-5, 7-6(3)	Hard
Aug 1	Mubadala DC Open	Round 1	Adrian Mannarino	L	2-6, 4-6	Hard
Jun 20	Wimbledon	Qualifying 1st Round	Andrea Vavassori	L	7-6(5), 2-6, 3-6	Grass
Jun 11	Queen's Club	Qualifying 1st Round	Feliciano Lopez	L	5-7, 4-6	Grass
Jun 4	Libema Open	Qualifying 1st Round	Andreas Seppi	L	6-7(4), 1-6	Grass
May 16	Roland Garros	Qualifying 1st Round	Felipe Meligeni Alves	L	3-6, 3-6	Clay

Date	Tournament	Round	Opponent	Result	Score	Surface
Sep 1	US Open	Round 1	Sumit Nagal	L	1-6, 3-6, 6-3, 1-6	Hard

2019: 5-15

Date	Tournament	Round	Opponent	Result	Score	Surface
Sep 26	Chengdu Open	Round 2	Denis Shapovalov	L	6-3, 3-6, 6-7(3)	Hard
Sep 23	Chengdu Open	Round 1	Jason Jung	W	4-6, 6-3, 7-6(2)	Hard
Aug 28	US Open	Round 2	Kei Nishikori	L	2-6, 6-4, 3-6, 5-7	Hard
Aug 26	US Open		Thiago Monteiro	W	6-3, 6-2, 6-3	Hard
Aug 26	US Open	Round 1	Thiago Monteiro	W	6-3, 6-2, 6-3	Hard
Aug 6	Rogers Cup (M)	Round 1	Marin Cilic	L	3-6, 6-7(7)	Hard
Jul 29	Citi Open	Round 1	Alexander Bublik	L	6-7(5), 3-6	Hard
Jul 25	BB&T Atlanta Open	Round 2	Alex de Minaur	L	4-6, 4-6	Hard
Jul 22	BB&T Atlanta Open	Round 1	Marius Copil	W	7-6(3), 7-5	Hard
Jul 16	Hall of Fame Open	Round 1	Denis Kudla	L	4-6, 6-7(5)	Grass
Jul 1	Wimbledon	Round 1	David Goffin	L	4-6, 4-6, 4-6	Grass
Jun 25	Turkish Airlines Open Antalya	Round 2	Jordan Thompson	L	6-7(7), 3-6	Grass

Show 8 more

Jun 24	Turkish Airlines Open Antalya	Round 1	Steve Darcis	W	6-3, 6-2	Grass
May 27	French Open	Round 1	Alex de Minaur	L	1-6, 4-6, 4-6	Clay
May 18	Banque Eric Sturdza Geneva Open		Bernabe Zapata Miralles	L	7-5, 4-6, 2-6	Clay
Apr 9	US Mens Clay Court Championship	Round 1	Santiago Giraldo	L	4-6, 4-6	Clay
Mar 20	Miami Open	Round 1	Janko Tipsarevic	L	3-6, 3-6	Hard
Mar 7	Indian Wells	Round 1	Malek Jaziri	L	4-6, 2-6	Hard
Jan 14	Australian Open	Round 1	Hyeon Chung	L	7-6(5), 7-6(5), 3-6, 2-6, 4-6	Hard
Jan 6	ASB Classic	Round 1	Philipp Kohlschreiber	L	4-6, 6-7(2)	Hard

2018: 5-8

Date	Tournament	Round	Opponent	Result	Score	Surface
Oct 18	Stockholm Open	Round 2	John Isner	L	6-7(2), 7-6(5), 6-7(5)	Hard
Oct 16	Stockholm Open	Round 1	Marius Copil	W	6-2, 3-6, 6-4	Hard
Oct 9	Shanghai Masters	Round 2	Borna Coric	L	4-6, 2-6	Hard
Oct 8	Shanghai Masters	Round 1	Nick Kyrgios	W	4-6, 6-4, 6-3	Hard
Sep 24	Chengdu Open	Round 1	Bernard Tomic	L	7-6(6), 6-7(3), 2-6	Hard
Aug 27	US Open	Round 1	John Isner	L	6-7(3), 3-6, 4-6	Hard
Aug 15	Western & Southern Open	Round 2	Pablo Carreno Busta	L	4-6, 4-6	Hard
Aug 13	Western & Southern Open	Round 1	Maximilian Marterer	W	7-6(1), 6-4	Hard
Aug 8	Rogers Cup (M)	Round 2	Alexander Zverev	L	4-6, 4-6	Hard
Aug 6	Rogers Cup (M)	Round 1	David Ferrer	W	7-6(5), 6-4	Hard
Jul 5	Wimbledon	Round 2	Kyle Edmund	L	4-6, 6-7(0), 2-6	Grass
Jul 3	Wimbledon	Round 1	Yuichi Sugita	W	2-6, 7-6(6), 6-2, 6-2	Grass

Show 1 more

Mar 9

Indian Wells

Round 1

Thomas Fabbiano

4-6, 4-6

Hard

2014: 2-11

Date	Tournament	Round	Opponent	Result	Score	Surface
Aug 25	US Open	Round 1	Andrey Kuznetsov	L	4-6, 6-4, 3-6, 5-7	Hard
Aug 19	ATP Winston-Salem Open	Round 2	John Isner	L	6-7(5), 2-6	Hard
Aug 17	ATP Winston-Salem Open	Round 1	Noah Rubin	W	6-2, 0-6, 7-6(5)	Hard
Jun 24	Wimbledon	Round 1	Sam Querrey	L	7-6(5), 4-6, 1-6, 5-7	Grass
Jun 16	ATP Topshelf Open	Round 1	Dmitry Tursunov	L	3-6, 6-7(3)	Grass
Jun 10	ATP AEGON Championships	Round 1	Marcos Baghdatis	L	7-6(6), 2-6, 1-6	Grass
May 27	French Open	Round 1	Axel Michon	L	1-6, 7-6(4), 7-5, 1-6, 4-6	Clay
Mar 20	ATP Sony Open Tennis	Round 1	Guillermo Garcia-Lopez	L	6-1, 1-6, 4-6	Hard
Mar 7	ATP BNP Paribas Open	Round 1	Marinko Matosevic	L	4-6, 4-6	Hard
Feb 18	ATP Delray Beach International Tennis Championship	Round 1	Lleyton Hewitt	L	3-6, 1-6	Hard
Jan 13	Australian Open	Round 1	Grigor Dimitrov	L	7-6(7), 4-6, 4-6, 3-6	Hard
Jan 8	ATP Heineken Open	Round 1	Daniel Brands	W	7-5, 4-6, 6-3	Hard

Show 1 more

Jan 8

ATP Heineken Open

Round 2

Yen-Hsun Lu

7-6(3), 2-6, 3-6

Hard

2013: 1-4

Date	Tournament	Round	Opponent	Result	Score	Surface
Aug 29	US Open	Round 2	Feliciano Lopez	L	4-6, 6-7(4), 6-4, 5-7	Hard
Aug 26	US Open	Round 1	Kenny De Schepper	W	6-7(5), 6-2, 7-6(0), 7-6(4)	Hard
Jun 17	Wimbledon		Filip Peliwo	L	2-6, 6-1, 7-9	Grass
Apr 9	ATP US Men's Claycourt Championships	Round 1	Jack Sock	L	6-7(3), 3-6	Clay
Feb 11	ATP SAP Open	Round 1	Jesse Levine	L	5-7, 2-6	Hard

2012: 1-2

Date	Tournament	Round	Opponent	Result	Score	Surface
Aug 31	US Open	Round 2	Richard Gasquet	L	3-6, 3-6, 1-6	Hard
Aug 29	US Open	Round 1	Jurgen Melzer	W	4-6, 6-3, 7-5, 5-7, 6-4	Hard
Jul 24	ATP Farmers Classic	Round 1	Paolo Lorenzi	L	4-6, 6-3, 0-6	Hard

Date	Tournament	Round	Opponent	Result	Score	Surface
Feb 9	ATP SAP Open	Round 1	Gael Monfils	L	3-6, 2-6	Hard

Date	Tournament	Round	Opponent	Result	Score	Surface
Sep 1	US Open	Round 1	Sam Querrey	L	3-6, 6-4, 5-7, 4-6	Hard

How he is doing nowThrough Jul 31

Last 103-7LWWLLLLLWLNewest first. Lost his last match.

CareerPro since 2012

14years2012 to 2023

2010First ATP matchLost to Sam Querrey, US Open
2014Career high No. 63Mar 17, 2014
Jul 31, 2023Latest matchLost to Michael Mmoh, Mubadala DC Open

Grand Slam titles

AO0Round 1 (2019)0-2 in our records

RG0Round 1 (2019)0-2 in our records

WIM0Round 2 (2018)1-4 in our records

USO0Round 2 (2019)4-7 in our records

First ATP match

Sep 1, 2010: lost to Sam Querrey 3-6, 6-4, 5-7, 4-6US Open, on hard

Latest match

Jul 31, 2023: lost to Michael Mmoh 3-6, 3-6Mubadala DC Open, Round 1, on hard court

Most often against

The players he has met most in our records, with the head-to-head.

John Isner3 meetings, finals 0-0

0-3Klahn trails

Last: Oct 18, 2018, Stockholm Open Round 2, lost

Alex de Minaur2 meetings, finals 0-0

0-2Klahn trails

Last: Jul 25, 2019, BB&T Atlanta Open Round 2, lost

Alexei Popyrin2 meetings, finals 0-0

1-1All square

Last: Mar 6, 2023, BNP Paribas Open Qualifying 1st Round, lost

Feliciano Lopez2 meetings, finals 0-0

0-2Klahn trails

Last: Jun 11, 2022, HSBC Championships Qualifying 1st Round, lost

Marius Copil2 meetings, finals 0-0

2-0Klahn leads

Last: Jul 22, 2019, BB&T Atlanta Open Round 1, won

Sam Querrey2 meetings, finals 0-0

0-2Klahn trails

Last: Jun 24, 2014, Wimbledon Round 1, lost

Sources and updates

Results and schedules come from Agatha's own records of the ATP Tour.

Updated Oct 5, 2026, 3:12 PM ET. Results and form refresh after every match; biography facts are checked weekly.