BEIJING:- Chinese tennis star Li Na beat Nadiya Kichenok of Ukraine in straight sets on Wednesday on a day of upsets at the Shenzhen Open. The 31-year-old Lidowned Kichenok 6-1 6-4 in second-round. In the day's biggest upset, Vania King downed number two seed Sara Errani 2-6, 7-6, 6-3. Patricia Mayr-Achleitner, meanwhile, upset third-seeded Klara Zakopalova in straight sets 7-6, 6-4. Monica Niculescu came from behind to beat Chan Yung-jan after dropping the first set 2-6. Niculescu took the last two 6-3, 6-0.–AFP