Jonathan Lefferts

NTRP rating 4.5C · 7 teams in 2026

Level

Desk level 4.15

The level is a Desk level as of the data run. It is The Tennis Desk's estimate of how the player is playing now, on the NTRP scale to two decimals. It is not an NTRP rating. The small chart beside the level is the rated lines in 2026.

Record

Year	Lines	Won-lost	Singles	Doubles
2026	15	5-10	—	5-10
2025	14	6-8	—	6-8
2024	19	7-12	—	7-12
2023	7	5-2	—	5-2
2022	27	15-12	0-1	15-11

League	Year	Won-lost
Adult 18 & Over Mens 4.5	2026	0-3
Adult 40 & Over Mens 4.5	2026	1-2
Adult 55 & Over Mens 8.0	2026	3-0
Adult 55 & Over Mens 9.0	2026	0-2
Combo Mens League 8.5	2026	0-1
Mixed 18 & Over 9.0	2026	0-1
Mixed 40 & Over 9.0	2026	1-1
Adult 18 & Over Mens 4.5	2025	0-2
Adult 18 & Over Mens 5.0	2025	0-1
Adult 40 & Over Mens 4.5	2025	1-2
Adult 55 & Over Mens 9.0	2025	1-1
Combo Mens League 8.5	2025	2-0
Mixed 18 & Over 9.0	2025	2-2
Adult 40 & Over Mens 4.5	2024	3-5
Adult 55 & Over Mens 9.0	2024	2-3
Combo Mens League 8.5	2024	1-3
Mixed 18 & Over 9.0	2024	1-1
Adult 40 & Over Mens 4.5	2023	2-1
Combo Mens League 9.5	2023	2-1
Mixed 18 & Over 9.0	2023	1-0
Adult 18 & Over Mens 4.5	2022	5-0
Adult 40 & Over Mens 4.5	2022	5-2
Adult 40 & Over Mens 5.0+	2022	1-1
Combo Mens League 8.5	2022	2-1
Combo Mens League 9.5	2022	0-3
Mixed 18 & Over 9.0	2022	0-4
Mixed 40 & Over 9.0	2022	2-1

Teams

2026

MARIN TC · Adult 18 & Over Mens 4.5 · NTRP rating 4.5C · roster record 0-3 in 3 lines
MARIN TC · Mixed 18 & Over 9.0 · NTRP rating 4.5C · roster record 0-1 in 1 line
MARIN TC · Mixed 40 & Over 9.0 · NTRP rating 4.5C · roster record 1-1 in 2 lines
MARIN TC · Adult 55 & Over Mens 9.0 · NTRP rating 4.5C · roster record 0-2 in 2 lines
RAFAEL RC · Adult 55 & Over Mens 8.0 · NTRP rating 4.5C · roster record 3-0 in 3 lines
RAFAEL RC/AWHS · Adult 40 & Over Mens 4.5 · NTRP rating 4.5C · roster record 1-2 in 4 lines
RAFAEL RC · Combo Mens League 8.5 · NTRP rating 4.5C · roster record 0-1 in 1 line

2025

FLYTE RC · Adult 40 & Over Mens 4.5 · NTRP rating 4.5C · roster record 1-2 in 3 lines
MARIN TC · Adult 18 & Over Mens 4.5 · NTRP rating 4.5C · roster record 0-2 in 3 lines
MARIN TC · Adult 18 & Over Mens 5.0 · NTRP rating 4.5C · roster record 0-1 in 1 line
MARIN TC · Adult 55 & Over Mens 9.0 · NTRP rating 4.5C · roster record 1-1 in 2 lines
RAFAEL RC · Mixed 18 & Over 9.0 · NTRP rating 4.5C · roster record 2-2 in 4 lines
RAFAEL RC · Combo Mens League 8.5 · NTRP rating 4.5C · roster record 2-0 in 2 lines

2024

MARIN TC · Mixed 18 & Over 9.0 · NTRP rating 4.5C · roster record 1-1 in 2 lines
MARIN TC · Adult 40 & Over Mens 4.5 · NTRP rating 4.5C · roster record 3-5 in 8 lines
MARIN TC · Adult 55 & Over Mens 9.0 · NTRP rating 4.5C · roster record 2-3 in 5 lines
RAFAEL RC · Combo Mens League 8.5 · NTRP rating 4.5C · roster record 1-3 in 4 lines

2023

MARIN TC · Adult 40 & Over Mens 4.5 · NTRP rating 4.5C · roster record 2-1 in 3 lines
MARIN TC · Combo Mens League 9.5 · NTRP rating 4.5C · roster record 2-1 in 3 lines
RAFAEL RC · Mixed 18 & Over 9.0 · NTRP rating 4.5C · roster record 1-0 in 2 lines

2022

MARIN TC · Adult 18 & Over Mens 4.5 · NTRP rating 4.5C · roster record 5-0 in 5 lines
MARIN TC · Adult 40 & Over Mens 4.5 · NTRP rating 4.5C · roster record 5-2 in 7 lines
MARIN TC · Adult 40 & Over Mens 5.0+ · NTRP rating 4.5C · roster record 1-1 in 2 lines
MARIN TC · Mixed 40 & Over 9.0 · NTRP rating 4.5C · roster record 2-1 in 3 lines
MARIN TC · Combo Mens League 8.5 · NTRP rating 4.5C · roster record 2-1 in 3 lines
MARIN TC · Combo Mens League 9.5 · NTRP rating 4.5C · roster record 0-3 in 3 lines
RAFAEL RC · Mixed 18 & Over 9.0 · NTRP rating 4.5C · roster record 0-4 in 4 lines

Match log

Team match	Partner	Opponents
August 29, 2026 · Doubles 1L7-6, 6-4
ROHNERT PK TC/MAGNOLIA/M PK v RAFAEL RC Combo Mens League 8.5	Sean Raymond	Gerald Mehciz, Tom Veach
July 19, 2026 · Doubles 2L6-2, 6-2
HARBOR PT v MARIN TC Mixed 40 & Over 9.0	Amy Ourso	Valeria Pinna, Richard Khoe
June 12, 2026 · Doubles 3W6-3, 7-5
MARIN TC v HARBOR PT Mixed 40 & Over 9.0	Jennifer Mills	Britt Doyle, Mary Carse
May 21, 2026 · Doubles 2W6-4, 6-0
BELVEDERE TC v RAFAEL RC Adult 55 & Over Mens 8.0	Phil Neal	Brandon Lawniczak, Rocky Moss
May 1, 2026 · Doubles 3L5-7, 6-0, 1-0
TIBURON PEN C v MARIN TC Adult 55 & Over Mens 9.0	Yong Kim	Clayton Flanagan, Kevin Keenley
April 29, 2026 · Doubles 3L6-3, 6-2
MARIN TC v ROHNERT PK TC/MAGNOLIA/M PK Adult 55 & Over Mens 9.0	Yong Kim	Steven Colletto, Howard Schnirman
April 23, 2026 · Doubles 1L6-3, 3-6, 1-0
MARIN TC v ROHNERT PK TC/MAGNOLIA/M PK Adult 18 & Over Mens 4.5	Michael Damiani	Jake Lam, Tom Veach
April 19, 2026 · Doubles 1W5-7, 7-5, 1-0
RAFAEL RC v ROHNERT PK TC/MAGNOLIA/M PK Adult 55 & Over Mens 8.0	Chris Beard	Geoffrey Kegley, Howard Schnirman
April 18, 2026 · Doubles 2L6-3, 4-6, 1-0
ROLLING HILLS v MARIN TC Adult 18 & Over Mens 4.5	David Erlich	Cory Fulchiron, Jonathan Thompson
April 6, 2026 · Doubles 2L6-3, 6-1
MARIN TC v FLYTE RC Adult 18 & Over Mens 4.5	Andrew Sohn	Geoffrey Gerding, Dennis Sanchez
March 21, 2026 · Doubles 2W6-1, 6-0
ROLLING HILLS v RAFAEL RC Adult 55 & Over Mens 8.0	Kevin Scheer	Mark Britschgi, Peter Kennedy
March 14, 2026 · Doubles 2W6-7, 6-2, 1-0
MILL VALLEY v RAFAEL RC/AWHS Adult 40 & Over Mens 4.5	Marty Perpich	Augusto Acosta, Brian Kneafsey
March 7, 2026 · Doubles 2L6-3, 6-0
RAFAEL RC/AWHS v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Daniel Krebs	Ricky Herzog, Timothy Barlow
February 7, 2026 · Doubles 2L6-4, 1-6, 1-0
RAFAEL RC/AWHS v MILL VALLEY Adult 40 & Over Mens 4.5	Marty Perpich	Jacques Soenens, Brian Kneafsey
January 10, 2026 · Doubles 1L6-3, 6-4
OLYMPIC v MARIN TC Mixed 18 & Over 9.0	Nicole Buckland	Lance Ngo, Nicole Wedlake
October 19, 2025 · Doubles 3W7-6, 6-3
RAFAEL RC v LAGUNITAS CC Combo Mens League 8.5	Nick Notti	Charles Williams, Cole van Brunt
September 18, 2025 · Doubles 1W6-4, 4-6, 1-0
MARIN TC v RAFAEL RC Combo Mens League 8.5	Nick Notti	David Erlich, Mike Schulist
May 21, 2025 · Doubles 2L5-7, 6-3, 1-0
MARIN TC v ROHNERT PK TC/MAGNOLIA/M PK Adult 55 & Over Mens 9.0	Marty Perpich	Michael Parr, Thomas Byrne
May 7, 2025 · Doubles 2L7-6, 6-2
MARIN TC v MILL VALLEY Adult 18 & Over Mens 4.5	Jason Holmes	Lucas Hatch, Brian Kneafsey
May 4, 2025 · Doubles 1W6-1, 6-3
ROHNERT PK TC/MAGNOLIA/M PK v MARIN TC Adult 55 & Over Mens 9.0	James Brandt	Gerald Mehciz, Michael Parr
April 27, 2025 · Doubles 2L6-2, 6-0
LAGUNITAS CC v MARIN TC Adult 18 & Over Mens 5.0	James Brandt	Andrew Biggs, Felix Arroyo Viglino
April 26, 2025 · Doubles 1L6-1, 6-4
MILL VALLEY v MARIN TC Adult 18 & Over Mens 4.5	John Backof	Paul Stiff, Finn Taylor
March 6, 2025 · Doubles 2L6-3, 1-6, 1-0
MT TAM RC v RAFAEL RC Mixed 18 & Over 9.0	Jennifer Slippy	Scott Key, Alison Revell
February 23, 2025 · Doubles 1L6-3, 7-6
FLYTE RC v TIBURON PEN C Adult 40 & Over Mens 4.5	Favio de Marco	Jeff Urban, Eddy Marcum
February 17, 2025 · Doubles 1W6-7, 7-6, 1-0
MARIN TC v FLYTE RC Adult 40 & Over Mens 4.5	Favio de Marco	Chris Trepte, Erik Sunden
February 15, 2025 · Doubles 1L7-5, 6-1
RAFAEL RC v MARIN TC Mixed 18 & Over 9.0	Jennifer Slippy	Lisa Eastlack, Samuel Wexman
January 18, 2025 · Doubles 1L6-1, 4-6, 1-0
TIBURON PEN C v FLYTE RC Adult 40 & Over Mens 4.5	Jim Jackson	David Mullarkey, Michel Seifer
January 12, 2025 · Doubles 2W6-2, 6-2
RAFAEL RC v MARIN TC Mixed 18 & Over 9.0	Jennifer Slippy	James Brenner, Kiran F Narsinh
January 11, 2025 · Doubles 2W6-4, 6-2
RAFAEL RC v MT TAM RC Mixed 18 & Over 9.0	Molly Neal	Robin Gluck, Scott Key
October 26, 2024 · Doubles 3L4-6, 6-0, 1-0
RAFAEL RC v MARIN TC Combo Mens League 8.5	Paul McGeehan	Michael Lustenberger, Pramote Phejtrakul
October 13, 2024 · Doubles 1W6-3, 3-6, 1-0
ROLLING HILLS v RAFAEL RC Combo Mens League 8.5	Jeffrey Thornton	Daniel Tyreus, Jonathan Thompson
October 6, 2024 · Doubles 2L2-6, 7-5, 1-0
RAFAEL RC v GALVIN PK Combo Mens League 8.5	Bob Fields	Ken Westly, Angelo Purugganan
September 4, 2024 · Doubles 1L6-1, 6-2
MARIN TC v RAFAEL RC Combo Mens League 8.5	Tommy Hellyer	James Brandt, Michael Lustenberger
July 13, 2024 · Doubles 2 · SectionalsL6-2, 6-2
OLYMPIC v MARIN TC Adult 55 & Over Mens 9.0	Marty Perpich	David McCallum, William Breck
July 12, 2024 · Doubles 2 · SectionalsL6-0, 6-3
Corey Reich Tennis Center v MARIN TC Adult 55 & Over Mens 9.0	Marty Perpich	Brian Heimbecker, Roman Olmos
June 6, 2024 · Doubles 3 · PlayoffsL6-3, 6-2
MARIN TC v HARBOR PT Adult 55 & Over Mens 9.0	Scott Harrison	Christopher Colwell, Robert Blechman
April 27, 2024 · Doubles 2W4-6, 7-6, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v MARIN TC Adult 55 & Over Mens 9.0	William Dagley	Thomas Byrne, Howard Schnirman
April 14, 2024 · Doubles 2 · PlayoffsL6-3, 6-7, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v MARIN TC Adult 40 & Over Mens 4.5	William Dagley	Cory Fulchiron, John Hosbein
April 7, 2024 · Doubles 1W7-5, 4-6, 1-0
MARIN TC v ROHNERT PK TC/MAGNOLIA/M PK Adult 55 & Over Mens 9.0	Marty Perpich	Gerald Mehciz, Michael Parr
March 24, 2024 · Doubles 3L6-7, 6-4, 1-0
MILL VALLEY v MARIN TC Adult 40 & Over Mens 4.5	MARK Plaskon	Michael Ellis, Mike Natenshon
March 17, 2024 · Doubles 3L7-5, 6-4
ROHNERT PK TC/MAGNOLIA/M PK v MARIN TC Adult 40 & Over Mens 4.5	Jason Holmes	Timothy Barlow, Steven Colletto
March 4, 2024 · Doubles 2L2-6, 6-3, 1-0
MARIN TC v RAFAEL RC Mixed 18 & Over 9.0	Alexis Kirkland	Michael Damiani, Emily Parento
February 21, 2024 · Doubles 2W6-3, 6-4
MARIN TC v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	MARK Plaskon	Cory Fulchiron, Steven Colletto
February 12, 2024 · Doubles 2W6-2, 6-3
MT TAM RC v MARIN TC Mixed 18 & Over 9.0	Kira Deguchi	Bill Frink, Michelle Gurman
February 6, 2024 · Doubles 1W4-6, 6-3, 1-0
MARIN TC v TIBURON PEN C Adult 40 & Over Mens 4.5	Michael Damiani	Christopher Colwell, Dan Oppenheim
February 3, 2024 · Doubles 1L6-1, 6-4
TIBURON PEN C v MARIN TC Adult 40 & Over Mens 4.5	Chris Trepte	Clayton Flanagan, Michel Seifer
January 22, 2024 · Doubles 2L7-6, 7-5
MARIN TC v MILL VALLEY Adult 40 & Over Mens 4.5	Steve Schreck	James Milligan, Andrew MacKay
January 14, 2024 · Doubles 1W6-1, 6-2
MARINWOOD COMM CTR v MARIN TC Adult 40 & Over Mens 4.5	James Brandt	Sacha Drazien, Jaron Eliopoulos
October 15, 2023 · Doubles 3W6-4, 6-3
ROLLING HILLS v MARIN TC Combo Mens League 9.5	Ashwin Gulati	Trevor Pinder, John Hosbein
October 13, 2023 · Doubles 3W1-6, 6-1, 1-0
MARIN TC v HARBOR PT Combo Mens League 9.5	James Brandt	Michael Mascott, Jaron Eliopoulos
September 8, 2023 · Doubles 3L6-2, 6-3
HARBOR PT v MARIN TC Combo Mens League 9.5	Jeffery Birkenseer	Curtis Dunn, Michael Mascott
March 5, 2023 · Doubles 1L3-6, 6-4, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v MARIN TC Adult 40 & Over Mens 4.5	Chris Trepte	John Hosbein, Cory Fulchiron
March 2, 2023 · Doubles 2W6-4, 7-5
MARINWOOD COMM CTR v MARIN TC Adult 40 & Over Mens 4.5	Mike Downs	Jeff Johnson, Steffen Kuehr
January 29, 2023 · Doubles 2W6-3, 6-1
RAFAEL RC v ROLLING HILLS Mixed 18 & Over 9.0	Alison St Sure	Andrew Hoppe, Jessica Redding
January 22, 2023 · Doubles 1W7-6, 6-2
TIBURON PEN C v MARIN TC Adult 40 & Over Mens 4.5	Chris Trepte	Christopher Colwell, Michel Seifer
November 19, 2022 · Doubles 1 · PlayoffsL6-1, 6-3
STRAWBERRY v MARIN TC Combo Mens League 9.5	Ashwin Gulati	Alex Krohn, T Eric Lehto
November 2, 2022 · Doubles 1W6-4, 7-5
TIBURON PEN C v MARIN TC Combo Mens League 8.5	John Backof	Jeffrey Fisher, Jesse Eisenhardt
October 31, 2022 · Doubles 1L6-2, 6-2
MARIN TC v STRAWBERRY Combo Mens League 9.5	Stefan Serbicki	Kevin Erickson, Jakub Pietrowski
October 23, 2022 · Doubles 2L6-3, 6-2
ROLLING HILLS v MARIN TC Combo Mens League 8.5	Mike Schulist	Cory Fulchiron, Kushal Chakrabarty
October 18, 2022 · Doubles 2W7-6, 6-1
MARIN TC v TIBURON PEN C Combo Mens League 8.5	Christopher Brawer	Michel Seifer, Troy Pewitt
October 3, 2022 · Doubles 1L6-1, 6-2
MARIN TC v STRAWBERRY Combo Mens League 9.5	Michael Damiani	Chad Andrews, Jakub Pietrowski
August 28, 2022 · Doubles 2W6-3, 6-3
HARBOR PT v MARIN TC Mixed 40 & Over 9.0	Brooke Juhl	David Herron, Janine Schiess
August 19, 2022 · Doubles 3L6-2, 6-4
MARIN TC v HARBOR PT Mixed 40 & Over 9.0	Alexis Kirkland	Robert Blechman, Christine Costamagna
July 7, 2022 · Doubles 1W6-3, 6-3
HARBOR PT v MARIN TC Mixed 40 & Over 9.0	Amy See	Georgina Goldman, Peter Olsen
June 17, 2022 · Doubles 1W4-6, 6-0, 1-0
MARIN TC v MAGNOLIA/M PK Adult 18 & Over Mens 4.5	Chris Trepte	Antonio Vigil, Jake Lam
May 23, 2022 · Doubles 2W6-0, 6-2
MARIN TC v ROLLING HILLS Adult 18 & Over Mens 4.5	Chris Trepte	Stefan Serbicki, Kevin Hinson
May 7, 2022 · Doubles 1W2-6, 6-3, 1-0
MAGNOLIA/M PK v MARIN TC Adult 18 & Over Mens 4.5	William Dagley	Steven Colletto, Jake Lam
April 30, 2022 · Doubles 1W7-6, 6-0
MARIN TC v MARINWOOD COMM CTR Adult 18 & Over Mens 4.5	Chris Trepte	Sacha Drazien, Steffen Kuehr
April 26, 2022 · Doubles 1W6-3, 7-6
MARIN TC v MILL VALLEY Adult 18 & Over Mens 4.5	Chris Trepte	Andrew Dailey, Craig Patterson
April 15, 2022 · Doubles 2 · SectionalsL4-6, 6-3, 1-0
ROUND HILL CC v RAFAEL RC Mixed 18 & Over 9.0	Jacqueline Osterman	David Mann, Kristen Foster
April 15, 2022 · Doubles 2 · SectionalsL6-2, 6-4
RAFAEL RC v MERVYN MORRIS PK Mixed 18 & Over 9.0	Anna Varnay-Truong	Helen Tam, Kevin Wang
March 13, 2022 · Doubles 1L7-6, 6-2
ROLLING HILLS v MARIN TC Adult 40 & Over Mens 4.5	Chris Trepte	Christopher Colwell, David Mullarkey
March 9, 2022 · Doubles 3W6-3, 6-2
MARIN TC v ROLLING HILLS Adult 40 & Over Mens 4.5	Mike Downs	Dallas DeKeyrel, Kenneth Shapiro
March 5, 2022 · Doubles 1L6-4, 6-2
MARIN TC v RAFAEL RC Mixed 18 & Over 9.0	Erin Chamberlin	Amy See, Favio de Marco
March 5, 2022 · Doubles 2W6-2, 6-3
MARIN TC v MARINWOOD COMM CTR Adult 40 & Over Mens 4.5	Daniel Krebs	Thomas Schmidt, Michael Moon
February 19, 2022 · Singles 1L7-5, 6-2
MARIN TC v MAGNOLIA/M PK Adult 40 & Over Mens 4.5	—	Jonathan Chinn
February 10, 2022 · Doubles 2W6-3, 2-6, 1-0
MARIN TC v TIBURON PEN C Adult 40 & Over Mens 5.0+	Daniel Krebs	William Breck, Andre Mancl
January 29, 2022 · Doubles 1W6-3, 6-2
MAGNOLIA/M PK v MARIN TC Adult 40 & Over Mens 4.5	Mike Downs	Jonathan Chinn, Michael Volkin
January 23, 2022 · Doubles 1L6-4, 6-2
MARIN TC v RAFAEL RC Mixed 18 & Over 9.0	Alison St Sure	Chris Trepte, Amy See
January 21, 2022 · Doubles 2W6-4, 6-4
MARIN TC v MILL VALLEY Adult 40 & Over Mens 4.5	Jeff Marquis	Chris Morgan, Paul Stiff
January 15, 2022 · Doubles 1W6-3, 6-1
MAGNOLIA/M PK v MARIN TC Adult 40 & Over Mens 4.5	Daniel Krebs	Jonathan Chinn, Steve Carter
January 6, 2022 · Doubles 3L6-3, 6-3
MARIN TC v OLYMPIC Adult 40 & Over Mens 5.0+	Chris Trepte	Chris Wolfe, John Buckley