Dawid Olejniczak (Polish pronunciation: [ˈdavit ɔlɛjˈɲit͡ʂak]; born March 1, 1983, in Łódź) is a Polish former tennis player.

Olejniczak has a career-high ATP singles ranking of World No. 185, achieved on 11 August 2008. He also has a career-high ATP doubles ranking of World No. 206, achieved on 17 July 2006.

In June, Olejniczak qualified in singles for the 2008 Wimbledon Championships after defeating World No. 184 Lukáš Rosol, No. 158 Aisam Qureshi, and Rik de Voest respectively in the three qualifying rounds.

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Win	1–0	Oct 2004	Mexico F12, Torreón	Futures	Hard	Michael Kogan	7–5, 6–2
Loss	1–1	Jun 2005	Poland F3, Koszalin	Futures	Clay	Filip Urban	2–6, 7–6(7–4), 4–6
Loss	1–2	Aug 2005	Poland F5, Bełchatów	Futures	Clay	Herbert Wiltschnig	6–1, 1–6, 0–6
Win	2–2	Sep 2005	Poland F7, Szczecin	Futures	Clay	Felipe Parada	6–2, 6–2
Win	3–2	Oct 2005	Mexico F13, Torreón	Futures	Hard	Antonio Ruiz-Rosales	7–5, 6–2
Loss	3–3	Jun 2006	Poland F8, Gdynia	Futures	Clay	Jordane Doble	0–3 ret.
Win	4–3	May 2007	Poland F2, Zabrze	Futures	Clay	Jordane Doble	7–6(7–4), 7–6(7–4)
Loss	4–4	Jun 2007	Poland F3, Kraków	Futures	Clay	Éric Prodon	5–7, 2–6
Win	5–4	Jun 2007	Poland F4, Koszalin	Futures	Clay	Mohammad Ghareeb	7–6(7–5), 2–6, 6–4
Loss	5–5	Oct 2007	Great Britain F19, Jersey	Futures	Hard	Frederik Nielsen	4–6, 7–6(8–6), 4–6
Loss	5–6	Nov 2007	Puebla, Mexico	Challenger	Hard	Leonardo Mayer	1–6, 4–6
Win	6–6	Mar 2008	Great Britain F5, St Peter	Futures	Hard	Martin Pedersen	6–2, 6–3
Win	7–6	Apr 2008	Mexico City, Mexico	Challenger	Hard	Sam Warburg	6–4, 6–3
Loss	7–7	Nov 2009	Czech Republic F4, Rožnov pod Radhoštěm	Futures	Carpet	Jan Mertl	4–6, 5–7
Win	8–7	Feb 2010	Bosnia & Herzegovina F1, Sarajevo	Futures	Carpet	Aldin Šetkić	6–4, 7–5

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Sep 2002	Poland F7, Łódź	Futures	Clay	Kamil Lewandowicz	Marcin Golab Marcin Matkowski	3–6, 4–6
Win	1–1	Jun 2004	Poland F2, Koszalin	Futures	Clay	Radoslav Nijaki	Jacob Melskens Federico Torresi	6–3, 6–7(4–7), 6–2
Loss	1–2	Sep 2004	Poland F6, Wrocław	Futures	Clay	Piotr Olechowski	Marcin Golab Krzysztof Kwinta	6–7(4–7), 6–7(2–7)
Loss	1–3	Nov 2004	Mexico F16, León	Futures	Hard	Piotr Szczepanik	Daniel Langre Víctor Romero	6–7(4–7), 5–7
Win	2–3	May 2005	Poland F1, Gdynia	Futures	Clay	Maciej Diłaj	Robert Godlewski Przemyslaw Stec	6–0, 6–1
Win	3–3	May 2005	Poland F2, Kędzierzyn-Koźle	Futures	Clay	Maciej Diłaj	Jordi Marse-Vidri Alberto Soriano-Maldonado	7–6(7–4), 6–2
Win	4–3	Jun 2005	Poland F3, Koszalin	Futures	Clay	Maciej Diłaj	Jakub Nijaki Filip Urban	7–5, 6–2
Win	5–3	Jun 2005	Poland F4, Bytom	Futures	Clay	Maciej Diłaj	Jakub Hasek Josef Neštický	1–0 ret.
Loss	5–4	Aug 2005	Poland F5, Bełchatów	Futures	Clay	Maciej Diłaj	Felipe Parada Tomasz Bednarek	2–6, 4–6
Win	6–4	Sep 2005	Poland F7, Szczecin	Futures	Clay	Maciej Diłaj	Felipe Parada Benedikt Stronk	6–3, 6–0
Loss	6–5	Sep 2005	Poland F8, Gliwice	Futures	Clay	Maciej Diłaj	Daniel Lustig Michal Varsanyi	3–6, 6–7(5–7)
Win	7–5	Oct 2005	Mexico F13, Torreón	Futures	Hard	Michal Domanski	Bruno Echagaray Carlos Palencia	6–4, 6–4
Win	8–5	Oct 2005	Mexico F16, Mazatlán	Futures	Hard	Richard Irwin	Bruno Echagaray Daniel Langre	7–6(7–4), 6–0
Win	9–5	Apr 2006	San Luis Potosí, Mexico	Challenger	Clay	Daniel Garza	Hector Almada Víctor Romero	6–2, 6–2
Loss	9–6	Apr 2006	León, Mexico	Challenger	Hard	Alexander Satschko	Juan Manuel Elizondo Miguel Gallardo Valles	3–6, 4–6
Win	10–6	Jun 2006	Poland F8, Gdynia	Futures	Clay	Filip Urban	Tomasz Bednarek Rick Schalkers	7–6(7–5), 6–3
Loss	10–7	Oct 2006	Great Britain F16, Glasgow	Futures	Hard	Philipp Marx	Ross Hutchins Josh Goodall	6–7(2–7), 5–7
Loss	10–8	Oct 2007	France F16, Nevers	Futures	Hard	Raphael Durek	Jérôme Inzerillo Josselin Ouanna	6–1, 6–7(4–7), [10–12]
Win	11–8	Oct 2007	Great Britain F19, Jersey	Futures	Hard	Raphael Durek	David Brewer Ian Flanagan	6–2, 6–0
Win	12–8	Nov 2007	Puebla, Mexico	Challenger	Hard	Raphael Durek	Santiago González Bruno Echagaray	6–2, 7–6(8–6)
Win	13–8	May 2008	Aarhus, Denmark	Challenger	Clay	Jean-Julien Rojer	Martin Pedersen Frederik Nielsen	7–6(7–4), 2–6, [10–8]
Win	14–8	Sep 2008	Szczecin, Poland	Challenger	Clay	David Marrero	Łukasz Kubot Oliver Marach	7–6(7–4), 6–3
Win	15–8	Mar 2009	Sarajevo, Bosnia & Herzegovina	Challenger	Hard	Konstantin Kravchuk	James Auckland Rogier Wassen	6–2, 3–6, [10–7]
Loss	15–9	Oct 2009	Belarus F1, Minsk	Futures	Carpet	Michał Przysiężny	Sergey Betov Nikolai Fidirko	6–7(3–7), 6–7(3–7)
Win	16–9	Nov 2009	Czech Republic F4, Rožnov pod Radhoštěm	Futures	Carpet	Denis Matsukevich	Jaroslav Pospíšil Pavel Šnobel	6–3, 6–4
Win	17–9	Mar 2010	Switzerland F1, Taverne	Futures	Carpet	Marcin Gawron	Jeremy Blandin Alexander Sadecky	6–1, 7–6(7–5)

• Dawid Olejniczak at the Association of Tennis Professionals
• Dawid Olejniczak at the International Tennis Federation
• Olejniczak Recent Match Results
• Olejniczak World Ranking History