Top seed out in Hobart
Top seed Su-Wei Hsieh fell at the first hurdle in the Hobart International following a long battle with Shuai Peng of China.
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Hsieh, from Chinese Taipei, was outplayed in the opening set but edged the second on a tie-break to keep her hopes of progressing alive.
The final set also went to a tie-break, but it was Peng who eventually came through 6-2 6-7 (4/7) 7-6 (7/4) after two and a half hours on court.
Second seed Sorana Cirstea of Romania was also taken to three sets by Nina Bratchikova but enjoyed a happier outcome, winning 3-6 7-5 6-2 against the Russian.
There were no problems for fourth seed Yaroslava Shvedova, who eased to a 6-4 6-1 victory over Spain's Lourdes Dominguez Lino in her opening match.
However, 2010 French Open champion Francesca Schiavone was another early casualty. The Italian, seeded sixth in Hobart, threw away the lead in a 2-6 6-3 7-6 (7/3) defeat to Kirsten Flipkens of Belgium.
Germany's Mona Barthel, the ninth seed and defending champion, recovered from a poor start to see off local wild card Ashleigh Barty 2-6 6-0 6-1.
In other first-round matches, Tsvetana Pironkova was a 6-3 6-4 winner over Irina-Camelia Begu, Chanelle Scheepers brushed aside Alize Cornet 6-1 6-2 and Elena Vesnina beat Silvia Soler Espinosa 6-2 6-4.
There were also straight-set victories for 2011 champion Jarmila Gajdosova, Simona Halep and Monica Niculescu, while Lauren Davis overcame Bojana Bobusic of Australia in three sets.