体坛英语新闻：Chinese Li cruises into semifinals at Australian Open

China's Li Na serves during the quarterfinal match of women's singles against Andrea Petkovic of Germany at the Australian Open tennis tournament in Melbourne, Australia, Jan. 25, 2011. (Xinhua/Meng Yongmin)

MELBOURNE, Australia, Jan. 25 (Xinhua) -- China's top player Li Na cruised into the semifinals at the Australian Open for a second consecutive time without conceding a single set here after ousting German rising star Andrea Petkovic in the women's singles quarterfinals.

Li, seeded 9th, came from behind to won both sets 6-2, 6-4 in 80 minutes, extending her winning streak to 10 matches in the new season.