Career
Daniela played doubles with sister Sandra on the Women's Tennis Association Tour and the International Tennis Federation Women"s Circuit. The team dominated doubles tennis in Austria in the mid-2000s, becoming the country"s Number. 1 team in 2006. Daniela played her final professional match on 14 December 2006, at the tournament in Valasske Mezirici, Czechoslovakian Republic.
She had partnered sister Sandra, losing in round one of doubles against Eva Hrdinova and Stanislava Hrozenska, 5–7, 2–6.
In January 2007, both Klemenschits and her twin were diagnosed with a rare form of abdominal cancer, squamous cell carcinoma, forcing their retirement. Fellow tennis players rallied for Klemenschits and donated money to pay off the removal of several tumours and the expensive medical care required.
Daniela died on 9 April 2008 in Salzburg, aged 25. Sandra, however, survived and returned to the doubles tour in July 2008.