# Mariusz Fyrstenberg

Mariusz Stanisław Fyrstenberg (born 8 July 1980) is a retired Polish tennis player who was a doubles specialist.
Fyrstenberg primarily partnered Marcin Matkowski. The pair won the Madrid Open twice, in addition to reaching the final at the US Open. They also reached the final of the ATP Finals and participated six times at the event overall.
He is currently the coach of Wesley Koolhof, Jan Zielinski and Hugo Nys.

## Significant finals
### Grand Slam tournament finals
#### Doubles: 1 (runner-up)

| Result | Year | Championship | Surface | Partner | Opponents | Score |
| Loss | 2011 | US Open | Hard | Marcin Matkowski | Jürgen Melzer Philipp Petzschner | 2–6, 2–6 |

### Year-end championships
#### Doubles: 1 (runner-up)

| Result | Year | Championship | Surface | Partner | Opponents | Score |
| Loss | 2011 | London, UK | Hard (i) | Marcin Matkowski | Max Mirnyi Daniel Nestor | 5–7, 3–6 |

### Masters 1000 finals
#### Doubles: 6 (2 titles, 4 runner-ups)

| Result | Year | Tournament | Surface | Partner | Opponents | Score |
| Loss | 2007 | Madrid Open | Hard (i) | Marcin Matkowski | Bob Bryan Mike Bryan | 3–6, 6–7$^{(4–7)}$ |
| Win | 2008 | Madrid Open | Hard (i) | Marcin Matkowski | Mahesh Bhupathi Mark Knowles | 6–2, 6–4 |
| Loss | 2009 | Shanghai Masters | Hard | Marcin Matkowski | Julien Benneteau Jo-Wilfried Tsonga | 2–6, 4–6 |
| Loss | 2010 | Shanghai Masters | Hard | Marcin Matkowski | Jürgen Melzer Leander Paes | 5–7, 6–4, [5–10] |
| Win | 2012 | Madrid Open (2) | Clay | Marcin Matkowski | Robert Lindstedt Horia Tecău | 6–3, 6–4 |
| Loss | 2013 | Miami Open | Hard | Marcin Matkowski | Aisam-ul-Haq Qureshi Jean-Julien Rojer | 4–6, 1–6 |

## ATP career finals
### Doubles: 44 (18 titles, 26 runner-ups)

* Legend
* Grand Slam tournaments (0–1)
* Tennis Masters Cup / ATP World Tour Finals (0–1)
* ATP Masters Series / ATP World Tour Masters 1000 (2–4)
* ATP International Series Gold / ATP World Tour 500 Series (3–6)
* ATP International Series / ATP World Tour 250 Series (13–14)
* Finals by surface
* Hard (7–17)
* Clay (9–8)
* Grass (2–0)
* Carpet (0–1)
* Finals by setting
* Outdoor (12–19)
* Indoor (6–7)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | Aug 2003 | Sopot Open, Poland | International | Clay | Marcin Matkowski | František Čermák Leoš Friedl | 6–4, 6–7$^{(7–9)}$, 6–3 |
| Win | 2–0 | Feb 2004 | Brasil Open, Brazil | International | Clay | Marcin Matkowski | Tomas Behrend Leoš Friedl | 6–2, 6–2 |
| Win | 3–0 | Aug 2005 | Sopot Open, Poland (2) | International | Clay | Marcin Matkowski | Lucas Arnold Ker Sebastián Prieto | 7–6$^{(9–7)}$, 6–4 |
| Loss | 3–1 | Sep 2005 | Campionati Internazionali di Sicilia, Italy | International | Clay | Marcin Matkowski | Martín García Mariano Hood | 2–6, 3–6 |
| Loss | 3–2 | Feb 2006 | Brasil Open, Brazil | International | Clay | Marcin Matkowski | Lukáš Dlouhý Pavel Vízner | 1–6, 6–4, [3–10] |
| Loss | 3–3 | Apr 2006 | Barcelona Open, Spain | Intl. Gold | Clay | Marcin Matkowski | Mark Knowles Daniel Nestor | 2–6, 7–6$^{(7–4)}$, [5–10] |
| Loss | 3–4 | Aug 2006 | Connecticut Open, United States | International | Hard | Marcin Matkowski | Jonathan Erlich Andy Ram | 3–6, 3–6 |
| Win | 4–4 | Sep 2006 | Romanian Open, Romania | International | Clay | Marcin Matkowski | Martín García Luis Horna | 6–7$^{(5–7)}$, 7–6$^{(7–5)}$, [10–8] |
| Loss | 4–5 | Oct 2006 | Campionati Internazionali di Sicilia, Italy | International | Clay | Marcin Matkowski | Martín García Luis Horna | 6–7$^{(1–7)}$, 6–7$^{(2–7)}$ |
| Loss | 4–6 | Oct 2006 | Swiss Indoors, Switzerland | International | Carpet (i) | Marcin Matkowski | Mark Knowles Daniel Nestor | 6–4, 4–6, [8–10] |
| Win | 5–6 | Aug 2007 | Sopot Open, Poland (3) | International | Clay | Marcin Matkowski | Martín García Sebastián Prieto | 6–1, 6–1 |
| Loss | 5–7 | Aug 2007 | Connecticut Open, United States | International | Hard | Marcin Matkowski | Mahesh Bhupathi Nenad Zimonjić | 3–6, 3–6 |
| Loss | 5–8 | Oct 2007 | Open de Moselle, France | International | Hard (i) | Marcin Matkowski | Arnaud Clément Michaël Llodra | 1–6, 4–6 |
| Win | 6–8 | Oct 2007 | Vienna Open, Austria | Intl. Gold | Hard (i) | Marcin Matkowski | Tomas Behrend Christopher Kas | 6–4, 6–2 |
| Loss | 6–9 | Oct 2007 | Madrid Open, Spain | Masters | Hard (i) | Marcin Matkowski | Bob Bryan Mike Bryan | 3–6, 6–7$^{(4–7)}$ |
| Loss | 6–10 | Apr 2008 | Barcelona Open, Spain | Intl. Gold | Clay | Marcin Matkowski | Bob Bryan Mike Bryan | 3–6, 2–6 |
| Win | 7–10 | Jun 2008 | Warsaw Open, Poland (4) | International | Clay | Marcin Matkowski | Nikolay Davydenko Yuri Schukin | 6–0, 3–6, [10–4] |
| Loss | 7–11 | Sep 2008 | Romanian Open, Romania | International | Clay | Marcin Matkowski | Nicolas Devilder Paul-Henri Mathieu | 6–7$^{(4–7)}$, 7–6$^{(11–9)}$, [20–22] |
| Loss | 7–12 | Oct 2008 | Open de Moselle, France | International | Hard (i) | Marcin Matkowski | Arnaud Clément Michaël Llodra | 7–5, 3–6, [8–10] |
| Win | 8–12 | Oct 2008 | Madrid Open, Spain | Masters | Hard (i) | Marcin Matkowski | Mahesh Bhupathi Mark Knowles | 6–4, 6–2 |
| Win | 9–12 | Jun 2009 | Eastbourne International, United Kingdom | 250 Series | Grass | Marcin Matkowski | Travis Parrott Filip Polášek | 6–4, 6–4 |
| Loss | 9–13 | Aug 2009 | Washington Open, United States | 500 Series | Hard | Marcin Matkowski | Martin Damm Robert Lindstedt | 7–5, 7–6$^{(7–3)}$ |
| Win | 10–13 | Oct 2009 | Malaysian Open, Malaysia | 250 Series | Hard (i) | Marcin Matkowski | Igor Kunitsyn Jaroslav Levinský | 6–2, 6–1 |
| Loss | 10–14 | Oct 2009 | Shanghai Masters, China | Masters 1000 | Hard | Marcin Matkowski | Julien Benneteau Jo-Wilfried Tsonga | 2–6, 4–6 |
| Win | 11–14 | Jun 2010 | Eastbourne International, United Kingdom (2) | 250 Series | Grass | Marcin Matkowski | Colin Fleming Ken Skupski | 6–3, 5–7, [10–8] |
| Loss | 11–15 | Oct 2010 | Malaysian Open, Malaysia | 250 Series | Hard (i) | Marcin Matkowski | František Čermák Michal Mertiňák | 6–7$^{(3–7)}$, 6–7$^{(5–7)}$ |
| Loss | 11–16 | Oct 2010 | China Open, China | 500 Series | Hard | Marcin Matkowski | Bob Bryan Mike Bryan | 1–6, 6–7$^{(5–7)}$ |
| Loss | 11–17 | Oct 2010 | Shanghai Masters, China | Masters 1000 | Hard | Marcin Matkowski | Jürgen Melzer Leander Paes | 5–7, 6–4, [5–10] |
| Loss | 11–18 | Oct 2010 | Vienna Open, Austria | 250 Series | Hard (i) | Marcin Matkowski | Daniel Nestor Nenad Zimonjić | 5–7, 6–3, [5–10] |
| Loss | 11–19 | Sep 2011 | US Open, United States | Grand Slam | Hard | Marcin Matkowski | Jürgen Melzer Philipp Petzschner | 2–6, 2–6 |
| Loss | 11–20 | Nov 2011 | ATP World Tour Finals, United Kingdom | Tour Finals | Hard (i) | Marcin Matkowski | Max Mirnyi Daniel Nestor | 5–7, 3–6 |
| Loss | 11–21 | Mar 2012 | Dubai Tennis Championships, UAE | 500 Series | Hard | Marcin Matkowski | Mahesh Bhupathi Rohan Bopanna | 4–6, 6–3, [5–10] |
| Win | 12–21 | Apr 2012 | Barcelona Open, Spain | 500 Series | Clay | Marcin Matkowski | Marcel Granollers Marc López | 2–6, 7–6$^{(9–7)}$, [10–8] |
| Win | 13–21 | May 2012 | Madrid Open, Spain (2) | Masters 1000 | Clay | Marcin Matkowski | Robert Lindstedt Horia Tecău | 6–3, 6–4 |
| Loss | 13–22 | Mar 2013 | Miami Open, United States | Masters 1000 | Hard | Marcin Matkowski | Aisam-ul-Haq Qureshi Jean-Julien Rojer | 4–6, 1–6 |
| Win | 14–22 | Jul 2013 | German Open, Germany | 500 Series | Clay | Marcin Matkowski | Alexander Peya Bruno Soares | 3–6, 6–1, [10–8] |
| Win | 15–22 | Jan 2014 | Brisbane International, Australia | 250 Series | Hard | Daniel Nestor | Juan Sebastián Cabal Robert Farah | 6–7$^{(4–7)}$, 6–4, [10–7] |
| Loss | 15–23 | Apr 2014 | Romanian Open, Romania | 250 Series | Clay | Marcin Matkowski | Jean-Julien Rojer Horia Tecău | 4–6, 4–6 |
| Win | 16–23 | Sep 2014 | Moselle Open, France | 250 Series | Hard (i) | Marcin Matkowski | Marin Draganja Henri Kontinen | 6–7$^{(3–7)}$, 6–3, [10–8] |
| Win | 17–23 | Feb 2015 | Memphis Open, United States | 250 Series | Hard (i) | Santiago González | Artem Sitak Donald Young | 5–7, 7–6$^{(7–1)}$, [10–8] |
| Loss | 17–24 | Feb 2015 | Mexican Open, Mexico | 500 Series | Hard | Santiago González | Ivan Dodig Marcelo Melo | 6–7$^{(2–7)}$, 7–5, [3–10] |
| Loss | 17–25 | Jul 2015 | Croatia Open, Croatia | 250 Series | Clay | Santiago González | Máximo González André Sá | 6–4, 3–6, [5–10] |
| Win | 18–25 | Feb 2016 | Memphis Open, United States (2) | 250 Series | Hard (i) | Santiago González | Steve Johnson Sam Querrey | 6–4, 6–4 |
| Loss | 18–26 | Oct 2016 | Chengdu Open, China | 250 Series | Hard | Pablo Carreño Busta | Raven Klaasen Rajeev Ram | 6–7$^{(2–7)}$, 5–7 |

## Performance timeline
### Doubles

Key :
| W | F | SF | QF | #R | RR | Q# | DNQ | A | NH |
| Tournament | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | SR | W–L |
| Grand Slam tournaments ||||||||||||||||||
| Australian Open | A | A | A | 1R | SF | 1R | 3R | QF | 2R | QF | QF | 1R | 3R | 1R | A | 0 / 11 | 18–11 |
| French Open | A | A | 3R | 3R | 2R | 1R | 2R | 2R | QF | 1R | 3R | QF | 1R | A | 1R | 0 / 12 | 15–12 |
| Wimbledon | A | A | 2R | 2R | 1R | 1R | 1R | 1R | 2R | 1R | 1R | A | 1R | 2R | A | 0 / 11 | 5–11 |
| US Open | A | A | 2R | 1R | 3R | 3R | 1R | 1R | QF | F | 1R | 1R | 3R | 2R | 1R | 0 / 13 | 16–13 |
| Win–loss | 0–0 | 0–0 | 4–3 | 3–4 | 7–4 | 2–4 | 3–4 | 4–4 | 8–4 | 8–4 | 5–4 | 3–3 | 4–4 | 2-3 | 0-2 | 0 / 47 | 53–47 |
| Year-end championships ||||||||||||||||||
| ATP World Tour Finals | A | A | A | A | RR | A | SF | RR | SF | F | A | RR | A | A | A | 0 / 6 | 9–13 |
| ATP Masters Series 1000 ||||||||||||||||||
| Indian Wells | A | A | 1R | A | 2R | 2R | 1R | QF | 1R | 1R | SF | 1R | 1R | A | A | 0 / 10 | 6–10 |
| Miami | A | A | 1R | A | 1R | 1R | 2R | 1R | SF | 1R | 1R | F | 1R | A | A | 0 / 10 | 7–10 |
| Monte Carlo | A | A | 2R | A | QF | 2R | 2R | QF | 2R | SF | 2R | 2R | 2R | A | A | 0 / 10 | 10–10 |
| Rome | A | A | A | A | 2R | A | QF | QF | 1R | 2R | QF | 1R | 1R | A | A | 0 / 8 | 5–7 |
| Hamburg | A | A | A | A | 2R | 2R | 2R | Held as Madrid (Clay) | Held as Madrid (Clay) | Held as Madrid (Clay) | Held as Madrid (Clay) | Held as Madrid (Clay) | Held as Madrid (Clay) | Held as Madrid (Clay) | Held as Madrid (Clay) | 0 / 3 | 3–3 |
| Madrid (Clay) | Held as Hamburg | Held as Hamburg | Held as Hamburg | Held as Hamburg | Held as Hamburg | Held as Hamburg | Held as Hamburg | 2R | QF | QF | W | 2R | QF | A | A | 1 / 6 | 9–5 |
| Canada | A | A | A | A | 1R | 1R | 1R | QF | 2R | QF | QF | SF | 2R | A | A | 0 / 9 | 1–9 |
| Cincinnati | A | A | A | A | 1R | 2R | QF | QF | QF | QF | QF | QF | 1R | A | A | 0 / 9 | 7–9 |
| Madrid (Hard) | A | A | A | A | QF | F | W | Held as Shanghai | Held as Shanghai | Held as Shanghai | Held as Shanghai | Held as Shanghai | Held as Shanghai | Held as Shanghai | Held as Shanghai | 1 / 3 | 9–2 |
| Shanghai | Not Held | Not Held | Not Held | Not Held | Not Held | Not Held | Not Held | F | F | SF | 2R | 2R | A | A | A | 0 / 5 | 8–5 |
| Paris | A | A | A | A | QF | 2R | SF | SF | 2R | QF | QF | 2R | A | A | A | 0 / 8 | 10–9 |
| Win–loss | 0–0 | 0–0 | 1–3 | 0–0 | 7–9 | 9–8 | 13–8 | 10–9 | 8–9 | 8–9 | 9–8 | 11-9 | 4–7 | 0–0 | 0-0 | 2 / 81 | 80–79 |
| Olympic Games ||||||||||||||||||
| Doubles | Not Held | Not Held | 1R | Not Held | Not Held | Not Held | QF | Not Held | Not Held | Not Held | 1R | Not Held | Not Held | Not Held | A | 0 / 3 | 2–3 |
| Career statistics ||||||||||||||||||
| Titles/Finals | 0–0 | 1–1 | 1–1 | 1–2 | 1–6 | 2–5 | 2–5 | 2–4 | 1–5 | 0–2 | 2–3 | 1-2 | 1–2 | 1–2 | 1-2 | 17–42 | 17–42 |
| Year-end ranking | 160 | 84 | 49 | 54 | 16 | 24 | 15 | 18 | 12 | 14 | 15 | 20 | 44 | 56 | 58 | | |