Daniela Klemenschits (13 November 1982 – 9 April 2008) was an Austrian professional tennis player.^[1] She won a total of 23 doubles titles on the ITF Circuit in her career.

Daniela and twin sister Sandra (fellow pro-player) were born in Vienna, Austria.

Daniela played doubles with sister Sandra on the WTA Tour and the ITF Women's Circuit.^[1] The team dominated doubles tennis in Austria in the mid-2000s, becoming the country's No. 1 team in 2006. Daniela won a total of 23 titles on the ITF-level and reached one final on the WTA Tour-level. She reached the top 100 of the WTA doubles rankings in 2005.^[1] Daniela also represented Austria on the Fed Cup in 2005, when they defeated Switzerland.

Daniela played her final professional match on 14 December 2006 in Valašské Meziříčí, Czech Republic, partnering sister Sandra and losing in round one against Eva Hrdinová and Stanislava Hrozenská, 5–7, 2–6.

In January 2007, both Klemenschits twins were diagnosed with a rare form of abdominal cancer, squamous cell carcinoma, forcing their retirement.^[1] Fellow tennis players rallied for Klemenschits and donated money to pay for the removal of several tumours and the expensive medical care required.^[1] Daniela died on 9 April 2008 in Salzburg, aged 25.^[1] Sandra, however, survived and returned to the doubles tour in July 2008.

Outcome	Date	Tournament	Surface	Partner	Opponents	Score
Runner-up	21 May 2005	İstanbul Cup, Turkey	Hard	Sandra Klemenschits	Marta Marrero Antonella Serra Zanetti	4–6, 0–6

Outcome	No.	Date	Tournament	Surface	Opponent	Score
Runner-up	1.	9 October 2000	ITF Cairo, Egypt	Clay	Aliénor Tricerri	4–5, 0–5, 2–4
Runner-up	2.	5 November 2000	ITF Cairo, Egypt	Clay	Adrienn Hegedűs	0–4, 0–4, 3–5
Runner-up	3.	3 December 2000	ITF Arad, Israel	Hard	Hannah Collin	3–5, 0–4, 0–4
Runner-up	4.	13 May 2001	ITF Tortosa, Spain	Clay	Capucine Rousseau	3–6, 0–6

Outcome	No.	Date	Tournament	Surface	Partner	Opponents	Score
Winner	1.	31 July 2000	ITF Rabat, Morocco	Clay	Sandra Klemenschits	Bianca Kamper Ekaterina Kozhokina	7–6(4), 6–0
Runner-up	1.	21 August 2000	ITF Kastoria, Greece	Carpet	Sandra Klemenschits	Eleni Daniilidou Evagelia Roussi	3–6, 4–6
Winner	2.	2 October 2000	ITF Cairo, Egypt	Clay	Sandra Klemenschits	Andrea Masaryková Aliénor Tricerri	4–1, 4–1, 4–2
Winner	3.	9 October 2000	ITF Cairo, Egypt	Clay	Sandra Klemenschits	Barbora Blahutiaková Zuzana Kučová	4–0, 4–0, 4–0
Runner-up	2.	30 October 2000	ITF Cairo, Egypt	Clay	Ayako Suzuki	Katarína Bašternáková Alena Paulenková	4–1, 4–5, 1–4
Winner	4.	11 November 2000	ITF Mansoura, Egypt	Clay	Adrienn Hegedűs	Giulia Meruzzi Monica Scartoni	5–4(5), 4–2, 4–0
Winner	5.	18 November 2000	ITF Beersheba, Israel	Hard	Sandra Klemenschits	Giulia Meruzzi Leonne Muller Van Moppe	4–0, 4–0, 5–3
Runner-up	3.	27 November 2000	ITF Arad, Israel	Hard	Sandra Klemenschits	Giulia Meruzzi Leonne Muller Van Moppe	4–5(4), 1–4, 2–4
Runner-up	4.	12 February 2001	ITF Faro, Portugal	Hard	Sandra Klemenschits	Olga Vymetálková Gabriela Navrátilová	0–6, 2–6
Winner	6.	5 March 2001	ITF Buchen, Germany	Carpet (i)	Sandra Klemenschits	Adrienn Hegedűs Eszter Molnár	7–6(5), 7–6(8)
Winner	7.	2 April 2001	ITF Athens, Greece	Clay	Sandra Klemenschits	Marijana Kovačević Biljana Pawlowa-Dimitrova	6–3, 7–5
Winner	8.	16 April 2001	ITF Belgrade, Yugoslavia	Clay	Sandra Klemenschits	Dragana Ilić Ana Timotić	6–2, 6–1
Runner-up	5.	23 April 2001	ITF Bournemouth, United Kingdom	Clay	Sandra Klemenschits	Maki Arai Julia Smith	7–6(4), 3–6, 3–6
Winner	9.	7 May 2001	ITF Tortosa, Spain	Clay	Sandra Klemenschits	Séverine Beltrame Capucine Rousseau	6–3, 6–3
Runner-up	6.	28 May 2001	ITF Biella, Italy	Clay	Sandra Klemenschits	Joana Cortez Vanessa Menga	6–7(4), 6–4, 3–6
Runner-up	7.	23 June 2001	ITF Båstad, Sweden	Clay	Sandra Klemenschits	Leanne Baker Manisha Malhotra	3–6, 1–6
Runner-up	8.	6 August 2001	Ladies Open Hechingen, Germany	Clay	Sandra Klemenschits	Magdalena Kučerová Lydia Steinbach	7–5, 2–6, 1–6
Runner-up	9.	1 October 2001	ITF Plzeň, Czech Republic	Carpet (i)	Sandra Klemenschits	Olga Vymetálková Gabriela Navrátilová	2–6, 3–6
Winner	10.	15 October 2001	ITF Giza, Egypt	Clay	Sandra Klemenschits	Olena Antypina Yuliana Fedak	6–4, 6–3
Runner-up	10.	22 October 2001	ITF Cairo, Egypt	Clay	Sandra Klemenschits	Gulnara Fattakhetdinova Elena Yaryshka	6–7(2), 3–6
Winner	11.	19 November 2001	ITF Mallorca, Spain	Clay	Sandra Klemenschits	Silvia Disderi Anna Floris	7–5, 6–4
Winner	12.	26 November 2001	ITF Mallorca, Spain	Clay	Sandra Klemenschits	Silvia Disderi Anna Floris	6–3, 6–4
Winner	13.	15 April 2002	ITF Hvar, Croatia	Clay	Sandra Klemenschits	Olena Antypina Lenka Tvarošková	4–6, 6–3, 6–0
Runner-up	11.	22 April 2002	ITF Cavtat, Croatia	Clay	Sandra Klemenschits	Susanne Trik Suzanne van Hartingsveldt	1–6, 3–6
Winner	14.	6 May 2002	ITF Zadar, Croatia	Clay	Sandra Klemenschits	Tina Hergold Sanda Mamić	6–4, 6–4
Winner	15.	17 June 2002	ITF Velp, Netherlands	Clay	Sandra Klemenschits	Helena Ejeson Kika Hogendoorn	6–2, 6–1
Runner-up	12.	19 August 2002	ITF Enschede, Netherlands	Clay	Debby Haak	Daniela Kix Annette Kolb	1–6, 5–7
Winner	16.	23 September 2002	ITF Sopron, Hungary	Clay	Sandra Klemenschits	Milena Nekvapilová Hana Šromová	6–7(2), 6–2, 6–2
Winner	17.	10 March 2003	ITF Makarska, Croatia	Clay	Stefanie Haidner	Gabriela Niculescu Monica Niculescu	3–6, 7–6(7), 6–4
Winner	18.	30 March 2003	ITF Rabat, Morocco	Clay	Chanelle Scheepers	Helena Ejeson Helena Norfeldt	6–3, 6–2
Runner-up	13.	7 April 2003	ITF Antalya, Turkey	Clay	Sandra Klemenschits	Zuzana Černá Vladimíra Uhlířová	3–6, 2–6
Winner	19.	28 April 2003	ITF Pula, Croatia	Clay	Sandra Klemenschits	Jana Macurová Zuzana Zemenová	6–2, 6–2
Runner-up	14.	26 May 2003	ITF Zadar, Croatia	Clay	Sandra Klemenschits	Mervana Jugić-Salkić Darija Jurak	3–6, 1–6
Runner-up	15.	28 July 2003	ITF Gardone Val Trompia, Italy	Clay	Sandra Klemenschits	Kildine Chevalier Silvia Disderi	4–6, 2–6
Runner-up	16.	4 August 2003	Ladies Open Hechingen, Germany	Clay	Sandra Klemenschits	Angelika Bachmann Jasmin Wöhr	1–6, 4–6
Runner-up	17.	15 September 2003	Sofia Cup, Bulgaria	Clay	Sandra Klemenschits	Dessislava Topalova Dragana Zarić	3–6, 5–7
Runner-up	18.	12 January 2004	ITF Dubai, United Arab Emirates	Hard	Sandra Klemenschits	Gulnara Fattakhetdinova Hana Šromová	3–6, 6–4, 4–6
Runner-up	19.	8 March 2004	ITF Rome, Italy	Clay	Sandra Klemenschits	Alice Canepa Emily Stellato	3–6, 6–2, 4–6
Runner-up	20.	29 March 2004	ITF Rabat, Morocco	Clay	Sandra Klemenschits	Maria Fernanda Alves Carla Tiene	1–6, 6–7(5)
Winner	20.	26 April 2004	ITF Taranto, Italy	Clay	Sandra Klemenschits	Stefanie Haidner Patricia Wartusch	6–2, 6–1
Runner-up	21.	16 August 2004	ITF Enschede, Netherlands	Clay	Sandra Klemenschits	Susanne Trik Tessy van de Ven	6–4, 0–6, 4–6
Runner-up	22.	23 August 2004	ITF Alphen a/d Rijn, Netherlands	Clay	Sandra Klemenschits	Leslie Butkiewicz Eveline Vanhyfte	5–7, 3–6
Runner-up	23.	4 October 2004	ITF Girona, Spain	Clay	Sandra Klemenschits	Erica Krauth Jasmin Wöhr	6–2, 4–6, 3–6
Winner	21.	13 December 2004	ITF Valašské Meziříčí, Czech Republic	Hard (i)	Sandra Klemenschits	Lucie Hradecká Eva Hrdinová	w/o
Winner	22.	12 January 2005	ITF Dubai, United Arab Emirates	Hard	Sandra Klemenschits	Kristina Grigorian Oxana Lyubtsova	7–5, 6–1
Runner-up	24.	24 January 2005	ITF Belfort, France	Hard (i)	Sandra Klemenschits	Michelle Gerards Anousjka van Exel	1–6, 2–4 ret.
Runner-up	25.	15 March 2005	ITF Morelia, Mexico	Hard	Sandra Klemenschits	Jorgelina Cravero Veronica Spiegel	4–6, 2–6
Runner-up	26.	29 March 2005	ITF Poza Rica, Mexico	Hard	Sandra Klemenschits	Seda Noorlander Mara Santangelo	2–6, 6–4, 3–6
Runner-up	27.	30 May 2005	ITF Raanana, Israel	Hard	Sandra Klemenschits	Tzipora Obziler Shahar Pe'er	6–7(2), 6–1, 2–6
Runner-up	28.	6 June 2005	Zagreb Ladies Open, Croatia	Clay	Sandra Klemenschits	Lucie Hradecká Vladimíra Uhlířová	2–6, 2–6
Runner-up	29.	24 April 2006	Open de Cagnes-sur-Mer, France	Clay	Sandra Klemenschits	Sophie Lefèvre Aurélie Védy	6–2, 4–6, 6–7(1)
Runner-up	30.	21 June 2006	ITF Fontanafredda, Italy	Clay	Sandra Klemenschits	Andrea Hlaváčková Renata Voráčová	4–6, 4–6
Runner-up	31.	26 June 2006	ITF Anif, Austria	Clay	Sandra Klemenschits	Katalin Marosi Marina Tavares	6–3, 6–7(2), 3–6
Runner-up	32.	18 July 2006	ITF Darmstadt, Germany	Clay	Sandra Klemenschits	Monica Niculescu Yevgenia Savransky	6–1, 0–6, 1–6
Runner-up	33.	22 August 2006	ITF Bielefeld, Germany	Clay	Sandra Klemenschits	Carmen Klaschka Justine Ozga	7–6(1), 3–6, 3–6
Winner	23.	31 October 2006	ITF Erding, Germany	Carpet (i)	Sandra Klemenschits	Carmen Klaschka Annette Kolb	1–6, 6–3, 6–2

• Daniela Klemenschits at the Women's Tennis Association
• Daniela Klemenschits at the International Tennis Federation
• Daniela Klemenschits at the Billie Jean King Cup (archived)