Daniela Hantuchova battled from a set down to beat Melanie Oudin in the first round of the LA Women's Championships. Hantuchova secured her place in round two with a 6–7 (3–7), 6–2, 6–2 triumph against the American qualifier.
The Chinese duo Li Na and Zheng Jie, seeded 12th and 14th respectively, also both progressed. The former was 6–0, 2–0 up against Ayumi Morita when her opponent retired ill, while Zheng was a 7–5, 1–6, 6–2 victor against the Ukrainian qualifier Olga Savchuk.
The 13th seed, Samantha Stosur of Australia, enjoyed a stress-free passage to round two with a 6–1, 6–2 triumph over Romania's Monica Niculescu. Sabine Lisicki, the 17th seed from Germany, was made to work a little harder but eventually progressed – spoiling the comeback of the 38-year-old Japanese qualifier Kimiko Date Krumm in the process – with a 7–6 (7–5), 2–6, 7–5 win.
Elsewhere, there were straight-sets victories for Romania's Sorana Cirstea, Canada's Aleksandra Wozniak and Poland's Urszula Radwanska.
The Russian pair Ekaterina Makarova and Maria Kirilenko also advanced courtesy of three-set wins against Hungary's Melinda Czink and South Africa's Chanelle Scheepers respectively.
In the evening's second-round matches, sixth seed Ana Ivanovic of Serbia outlasted American Vania King 6–4, 4–6, 6–1 and second seed Vera Zvonareva of Russia battled hard to defeat China's Shuai Peng, 3–6, 6–3, 7–6 (8–6).