losing at Indian Wells and Miami. At Wimbledon, however, she reached the third round of a Grand Slam for the first time, defeating 20th seed Shahar Pe'er before losing to 16th seed Flavia Pennetta. She reached the semifinals of the China Open and represented her country for the first time in her Fed Cup career, winning both her ties against Indonesia. In 2007, Peng failed to get past the second round of the Australian Open and the first round of the US Open but reached the semifinals of the Tier-III Pattaya Open, losing to Sybille Bammer. At the China Open, Peng beat former world No. 1 and five-time Grand Slam champion Martina Hingis in the final match of Hingis's professional career. She finished the year with a 26–21 record in singles, a doubles title in Guangzhou with Yan Zi, and one top-ten win against Amélie Mauresmo. 2008–2010: New coach, doubles with Hsieh, injuries After a string of losses in 2008, Peng recorded her first win of the year at the Tier-II Bangalore Open against Anne Kremer before losing to Venus Williams; she also won the doubles title with Sun Tiantian. At Strasbourg, she recorded a top-ten win when top seed Marion Bartoli was forced to retire in round one while trailing. Peng reached the second round of the US Open for the first time in her career, defeating Eleni Daniilidou before losing to Flavia Pennetta. At the Summer Olympics, Peng competed in the women's singles, and the women's doubles with Sun Tiantian. The doubles pair were knocked out in the first round, and Peng lost to Alizé Cornet in the second round of the singles. In early 2009, Peng announced that she will be coached full-time for the 2009 season by Tarik Benhabiles. She won the Sydney International doubles title with Hsieh Su-wei, defeating Nathalie Dechy and Casey Dellacqua in the final. At the Italian Open in May, Peng partnered with Hsieh again and won the doubles title by defeating Daniela Hantuchová and Ai Sugiyama. At the French Open, Peng was knocked out of the singles event but partnered with Hsieh to reach the semifinals in doubles, defeating Hantuchová & Sugiyama in the third round and the Radwańska sisters in the quarterfinals before losing to Victoria Azarenka and Elena Vesnina. At the 2009 Wimbledon Championships, Peng fell to No. 11 Agnieszka Radwańska in the second round, after a mammoth battle