John Hosbein

NTRP rating 4.5C · 2 teams in 2026

Level

Desk level 4.54

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	11	11-0	—	11-0
2025	12	7-5	—	7-5
2024	18	12-6	1-0	11-6
2023	19	11-8	1-1	10-7
2022	13	8-5	1-1	7-4

League	Year	Won-lost
Adult 18 & Over Mens 4.5	2026	6-0
Adult 40 & Over Mens 4.5	2026	5-0
Adult 18 & Over Mens 4.5	2025	1-0
Adult 40 & Over Mens 4.5	2025	4-1
Adult 55 & Over Mens 9.0	2025	2-4
Adult 18 & Over Mens 4.5	2024	7-4
Adult 40 & Over Mens 4.5	2024	5-2
Adult 18 & Over Mens 4.5	2023	6-3
Adult 40 & Over Mens 4.5	2023	3-2
Combo Mens League 8.5	2023	0-1
Combo Mens League 9.5	2023	2-2
Adult 18 & Over Mens 4.5	2022	6-2
Adult 40 & Over Mens 4.5	2022	2-3

Teams

2026

ROHNERT PK TC/MAGNOLIA/M PK · Adult 18 & Over Mens 4.5 · NTRP rating 4.5C · roster record 6-0 in 7 lines
ROHNERT PK TC/MAGNOLIA/M PK · Adult 40 & Over Mens 4.5 · NTRP rating 4.5C · roster record 6-2 in 9 lines

2025

ROHNERT PK TC/MAGNOLIA/M PK · Adult 18 & Over Mens 4.5 · NTRP rating 4.5C · roster record 2-0 in 3 lines
ROHNERT PK TC/MAGNOLIA/M PK · Adult 40 & Over Mens 4.5 · NTRP rating 4.5C · roster record 4-1 in 5 lines
ROHNERT PK TC/MAGNOLIA/M PK · Adult 55 & Over Mens 9.0 · NTRP rating 4.5C · roster record 2-4 in 7 lines

2024

ROHNERT PK TC/MAGNOLIA/M PK · Adult 18 & Over Mens 4.5 · NTRP rating 4.5C · roster record 3-2 in 5 lines
ROHNERT PK TC/MAGNOLIA/M PK · Adult 40 & Over Mens 4.5 · NTRP rating 4.5C · roster record 5-2 in 7 lines
ROLLING HILLS · Adult 18 & Over Mens 4.5 · NTRP rating 4.5C · roster record 4-2 in 6 lines

2023

ROHNERT PK TC/MAGNOLIA/M PK · Adult 18 & Over Mens 4.5 · NTRP rating 4.5C · roster record 1-0 in 1 line
ROHNERT PK TC/MAGNOLIA/M PK · Adult 40 & Over Mens 4.5 · NTRP rating 4.5C · roster record 3-2 in 5 lines
ROHNERT PK TC/MAGNOLIA/M PK · Combo Mens League 8.5 · NTRP rating 4.5C · roster record 0-1 in 1 line
ROLLING HILLS · Adult 18 & Over Mens 4.5 · NTRP rating 4.5C · roster record 5-3 in 9 lines
ROLLING HILLS · Combo Mens League 9.5 · NTRP rating 4.5C · roster record 2-2 in 4 lines

2022

ROLLING HILLS · Adult 18 & Over Mens 4.5 · NTRP rating 4.5C · roster record 6-2 in 8 lines
ROLLING HILLS · Adult 40 & Over Mens 4.5 · NTRP rating 4.5C · roster record 2-3 in 5 lines

Match log

Team match	Partner	Opponents
June 27, 2026 · Doubles 3 · PlayoffsW6-2, 7-6
FLYTE RC v ROHNERT PK TC/MAGNOLIA/M PK Adult 18 & Over Mens 4.5	Michael Saucy	Caben Chester, Sacha Drazien
June 10, 2026 · Doubles 1W6-4, 7-5
ROHNERT PK TC/MAGNOLIA/M PK v ROLLING HILLS Adult 18 & Over Mens 4.5	Michael Saucy	Cory Fulchiron, Daniel Tyreus
June 7, 2026 · Doubles 1W6-4, 6-3
FLYTE RC v ROHNERT PK TC/MAGNOLIA/M PK Adult 18 & Over Mens 4.5	Michael Saucy	Richard Khoe, Steffen Kuehr
June 6, 2026 · Doubles 1W6-4, 6-3
ROHNERT PK TC/MAGNOLIA/M PK v MILL VALLEY Adult 18 & Over Mens 4.5	Antonio Vigil	Bill Graham, Jonathan Rutchik
May 16, 2026 · Doubles 1W6-0, 6-3
ROLLING HILLS v ROHNERT PK TC/MAGNOLIA/M PK Adult 18 & Over Mens 4.5	Michael Saucy	David Mullarkey, John Hackbert
April 19, 2026 · Doubles 3W4-6, 6-3, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v ROLLING HILLS Adult 18 & Over Mens 4.5	Max Luedecke	Mark Moyer, Eric David
March 14, 2026 · Doubles 2W6-4, 6-3
FLYTE RC v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Timothy Barlow	Robert Herbst, Chris Neal
February 14, 2026 · Doubles 2W6-4, 2-6, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v MILL VALLEY Adult 40 & Over Mens 4.5	Jonathan Chinn	Michael Mascott, Andrew Mercy
February 7, 2026 · Doubles 2W6-4, 4-6, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v TIBURON PEN C Adult 40 & Over Mens 4.5	Daniel Tyreus	William Breck, Jeffrey Webb
January 31, 2026 · Doubles 2W6-1, 6-1
ROHNERT PK TC/MAGNOLIA/M PK v RAFAEL RC/AWHS Adult 40 & Over Mens 4.5	Cory Fulchiron	Michael Parr, Todd Fitzgerald
January 11, 2026 · Doubles 3W6-2, 7-6
MILL VALLEY v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Daniel Tyreus	Jim Humes, Courtenay MacOmber
May 18, 2025 · Doubles 1W6-0, 6-1
MARIN TC v ROHNERT PK TC/MAGNOLIA/M PK Adult 55 & Over Mens 9.0	Michael Parr	Andrew Loft, Andrew Sohn
April 27, 2025 · Doubles 2L6-2, 6-7, 1-0
HARBOR PT v ROHNERT PK TC/MAGNOLIA/M PK Adult 55 & Over Mens 9.0	Howard Schnirman	James Milligan, Moses Gittens
April 26, 2025 · Doubles 2W6-7, 6-0, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v HARBOR PT Adult 55 & Over Mens 9.0	Michael Parr	Curtis Dunn, Christopher Colwell
April 13, 2025 · Doubles 1W2-6, 6-4, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v GALVIN PK Adult 18 & Over Mens 4.5	Cory Fulchiron	Jonathan Chinn, Michael Volkin
April 12, 2025 · Doubles 1L3-6, 6-3, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v MARIN TC Adult 55 & Over Mens 9.0	Jonathan Chinn	James Brandt, Steve Schreck
April 5, 2025 · Doubles 1L6-1, 7-6
ROHNERT PK TC/MAGNOLIA/M PK v HARBOR PT Adult 55 & Over Mens 9.0	Antonio Vigil	Michael Viani, Michael Rennels
March 22, 2025 · Doubles 2L6-3, 7-5
ROHNERT PK TC/MAGNOLIA/M PK v MARIN TC Adult 55 & Over Mens 9.0	Michael Parr	William Dagley, Kevin Erickson
March 15, 2025 · Doubles 1L6-3, 7-5
TIBURON PEN C v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Tom Veach	David Mullarkey, Jeff Urban
February 15, 2025 · Doubles 3W7-6, 6-2
FLYTE RC v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Timothy Barlow	Craig Flax, Yoram Tal
February 9, 2025 · Doubles 1W6-3, 4-6, 1-0
TIBURON PEN C v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Matthew Nakagawa	Eddy Marcum, David Mullarkey
January 25, 2025 · Doubles 2W6-4, 6-2
MARIN TC v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Cory Fulchiron	Michael Lustenberger, Scott Harrison
January 12, 2025 · Doubles 2W7-6, 6-1
MILL VALLEY v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Ricky Herzog	Michael Ellis, Craig Patterson
August 17, 2024 · Doubles 1 · SectionalsL6-3, 6-3
ROLLING HILLS v FREMONT TC Adult 18 & Over Mens 4.5	Stefan Serbicki	Vijay Sundaresan, Neil Thanawala
June 15, 2024 · Doubles 2W6-1, 1-6, 1-0
ROLLING HILLS v MARINWOOD COMM CTR Adult 18 & Over Mens 4.5	Scott Williams	Chris Neal, Bennett Gazor
June 3, 2024 · Doubles 2W6-1, 6-1
MILL VALLEY v ROLLING HILLS Adult 18 & Over Mens 4.5	Stefan Serbicki	Courtenay MacOmber, Steven Morrow
May 26, 2024 · Singles 1W3-6, 6-2, 1-0
MILL VALLEY v ROLLING HILLS Adult 18 & Over Mens 4.5	—	Onno Koelman
May 26, 2024 · Doubles 1W6-4, 2-6, 1-0
GALVIN PK v ROHNERT PK TC/MAGNOLIA/M PK Adult 18 & Over Mens 4.5	Stefan Serbicki	Jonathan Chinn, Michael Saucy
May 18, 2024 · Doubles 2L3-6, 6-2, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v GALVIN PK Adult 18 & Over Mens 4.5	Cory Fulchiron	Jonathan Chinn, Patrick Lam
May 12, 2024 · Doubles 3W7-5, 6-2
GALVIN PK v ROHNERT PK TC/MAGNOLIA/M PK Adult 18 & Over Mens 4.5	Matthew Nakagawa	Jonathan Chinn, Scott Dunaway
April 28, 2024 · Doubles 2L4-6, 7-6, 1-0
GALVIN PK v ROHNERT PK TC/MAGNOLIA/M PK Adult 18 & Over Mens 4.5	Timothy Barlow	Drew Gottlieb, Jonathan Chinn
April 20, 2024 · Doubles 1W6-4, 0-6, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v GALVIN PK Adult 18 & Over Mens 4.5	Timothy Barlow	Michael Saucy, Evan Vercellini
April 18, 2024 · Doubles 2W4-6, 7-5, 1-0
ROLLING HILLS v MARINWOOD COMM CTR Adult 18 & Over Mens 4.5	Stefan Serbicki	Jeff Johnson, Geoffrey Gerding
April 14, 2024 · Doubles 2 · PlayoffsW6-3, 6-7, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v MARIN TC Adult 40 & Over Mens 4.5	Cory Fulchiron	William Dagley, Jonathan Lefferts
April 10, 2024 · Doubles 3L6-4, 6-2
MARIN TC v ROLLING HILLS Adult 18 & Over Mens 4.5	Scott Williams	Christopher Brawer, Michael Lustenberger
March 24, 2024 · Doubles 1W6-4, 4-6, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v MILL VALLEY Adult 40 & Over Mens 4.5	Seth Nobmann	Matt Dunn, Augusto Acosta
March 21, 2024 · Doubles 1W6-3, 6-4
MARINWOOD COMM CTR v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Cory Fulchiron	Robert Ahearn, Thomas Schmidt
February 24, 2024 · Doubles 1W6-2, 6-0
ROHNERT PK TC/MAGNOLIA/M PK v MARINWOOD COMM CTR Adult 40 & Over Mens 4.5	Jonathan Chinn	Jeffrey Heely, David Levy
February 21, 2024 · Doubles 1L7-6, 6-3
MARIN TC v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Seth Nobmann	Steve Schreck, James Brandt
January 28, 2024 · Doubles 1W6-2, 7-6
TIBURON PEN C v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Matthew Nakagawa	Christopher Colwell, Clayton Flanagan
January 27, 2024 · Doubles 1L6-3, 6-4
MILL VALLEY v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Stefan Serbicki	Michael Ellis, Craig Patterson
October 15, 2023 · Doubles 3L6-4, 6-3
ROLLING HILLS v MARIN TC Combo Mens League 9.5	Trevor Pinder	Ashwin Gulati, Jonathan Lefferts
October 8, 2023 · Doubles 3W6-3, 2-6, 1-0
HARBOR PT v ROLLING HILLS Combo Mens League 9.5	Daniel Tyreus	Jaron Eliopoulos, Michael Mascott
October 6, 2023 · Doubles 3L6-2, 6-1
ROLLING HILLS v MARIN TC Combo Mens League 9.5	Daniel Tyreus	Christopher Ruiz Chiu, James Brandt
September 17, 2023 · Doubles 1W6-4, 2-6, 1-0
ROLLING HILLS v HARBOR PT Combo Mens League 9.5	Ryan Smith	Marc Lamonica, Craig Patterson
September 16, 2023 · Doubles 1L6-2, 6-3
ROHNERT PK TC/MAGNOLIA/M PK v GALVIN PK Combo Mens League 8.5	Jamin Ruark	Jonathan Chinn, Cody Otero
August 12, 2023 · Doubles 3 · SectionalsW6-1, 6-7, 1-0
JOHNSON RANCH v ROLLING HILLS Adult 18 & Over Mens 4.5	Trevor Pinder	Parris Krygsman, Paul Phillips
August 12, 2023 · Singles 1 · SectionalsL7-5, 6-1
ROLLING HILLS v WALLENBERG PK Adult 18 & Over Mens 4.5	—	Yiliu Wang
August 11, 2023 · Doubles 3 · SectionalsL6-2, 6-4
ROLLING HILLS v MODESTO F RC Adult 18 & Over Mens 4.5	John Hackbert	Austin Tay, Justin Zertuche
July 8, 2023 · Doubles 3 · PlayoffsW6-1, 6-2
ROLLING HILLS v MILL VALLEY Adult 18 & Over Mens 4.5	John Hackbert	Kenneth Austin, Craig Patterson
June 15, 2023 · Doubles 3L4-6, 6-2, 1-0
MARINWOOD COMM CTR v ROLLING HILLS Adult 18 & Over Mens 4.5	Dallas DeKeyrel	Jaron Eliopoulos, Chris Neal
May 28, 2023 · Singles 2W6-4, 5-7, 1-0
GALVIN PK v ROHNERT PK TC/MAGNOLIA/M PK Adult 18 & Over Mens 4.5	—	Jonathan Chinn
May 24, 2023 · Doubles 3W6-0, 6-3
MILL VALLEY v ROLLING HILLS Adult 18 & Over Mens 4.5	Stefan Serbicki	Andrew MacKay, James Milligan
May 6, 2023 · Doubles 1W7-6, 6-3
ROLLING HILLS v MARINWOOD COMM CTR Adult 18 & Over Mens 4.5	David Mullarkey	Jeff Johnson, Jaron Eliopoulos
April 30, 2023 · Doubles 1W6-4, 6-1
TIBURON PEN C v ROLLING HILLS Adult 18 & Over Mens 4.5	Ryan Smith	Jeffrey Webb, Tyler Will
March 26, 2023 · Doubles 1 · PlayoffsL6-3, 6-4
ROHNERT PK TC/MAGNOLIA/M PK v HARBOR PT Adult 40 & Over Mens 4.5	Cory Fulchiron	Giancarlo Andreani, T Eric Lehto
March 5, 2023 · Doubles 1W3-6, 6-4, 1-0
ROHNERT PK TC/MAGNOLIA/M PK v MARIN TC Adult 40 & Over Mens 4.5	Cory Fulchiron	Chris Trepte, Jonathan Lefferts
March 4, 2023 · Doubles 3W6-0, 6-0
MARINWOOD COMM CTR v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Antonio Vigil	Michael Lustenberger, Charles Spelman
January 29, 2023 · Doubles 1L6-4, 6-3
MARIN TC v ROHNERT PK TC/MAGNOLIA/M PK Adult 40 & Over Mens 4.5	Cory Fulchiron	Chris Trepte, Steve Schreck
January 22, 2023 · Doubles 2W6-3, 6-3
ROHNERT PK TC/MAGNOLIA/M PK v MILL VALLEY Adult 40 & Over Mens 4.5	Tony Greco	Mark Shaw, Andrew MacKay
August 6, 2022 · Doubles 1 · SectionalsW6-4, 2-6, 1-0
ROLLING HILLS v WASHINGTON PK Adult 18 & Over Mens 4.5	Ryan Smith	James Alliston, Jeffrey Nibler
August 5, 2022 · Singles 2 · SectionalsL6-1, 6-1
FIG GARDEN v ROLLING HILLS Adult 18 & Over Mens 4.5	—	William Dau
July 10, 2022 · Doubles 2 · PlayoffsL6-4, 6-1
ROLLING HILLS v MAGNOLIA/M PK Adult 18 & Over Mens 4.5	Stefan Serbicki	Cory Fulchiron, Steven Colletto
June 4, 2022 · Doubles 2W6-2, 6-0
ROLLING HILLS v MAGNOLIA/M PK Adult 18 & Over Mens 4.5	Stefan Serbicki	Michael Volkin, Jonathan Chinn
May 21, 2022 · Doubles 1W6-3, 6-3
ROLLING HILLS v MARINWOOD COMM CTR Adult 18 & Over Mens 4.5	Stefan Serbicki	Jeff Johnson, Jay Marx
May 9, 2022 · Doubles 1W7-5, 2-6, 1-0
ROLLING HILLS v MILL VALLEY Adult 18 & Over Mens 4.5	David Mullarkey	Larry Smith, Paul Stiff
May 1, 2022 · Doubles 2W6-0, 6-3
ROLLING HILLS v MILL VALLEY Adult 18 & Over Mens 4.5	David Mullarkey	Eric Issadore, Jim Humes
April 30, 2022 · Doubles 1W6-2, 6-0
MAGNOLIA/M PK v ROLLING HILLS Adult 18 & Over Mens 4.5	Stefan Serbicki	Steve Carter, Howard Schnirman
April 23, 2022 · Doubles 1 · SectionalsL7-5, 6-1
ROLLING HILLS v MONTE VISTA HS Adult 40 & Over Mens 4.5	David Mullarkey	Leif Krauss, David Lu
April 23, 2022 · Doubles 3 · SectionalsL6-1, 6-0
FOSTER CITY TC/EDGEWATER PK v ROLLING HILLS Adult 40 & Over Mens 4.5	Joel Garrett	Paul Dulac, Brian Heimbecker
March 27, 2022 · Doubles 3 · PlayoffsL4-6, 6-3, 1-0
ROLLING HILLS v MILL VALLEY Adult 40 & Over Mens 4.5	Craig Steiger	Craig Patterson, Jim Humes
February 20, 2022 · Doubles 3W7-5, 6-4
ROLLING HILLS v MILL VALLEY Adult 40 & Over Mens 4.5	Elden K Lew	Chris Morgan, Craig Patterson
January 22, 2022 · Singles 1W7-5, 4-6, 1-0
ROLLING HILLS v MARINWOOD COMM CTR Adult 40 & Over Mens 4.5	—	Randolph Kirk