India's Sania Mirza beats third seed Akgul Amanmuradova of Uzbekistan 6-4, 6-3 to advance to the quarterfinals of the Guangzhou International Women's Open in China on Wednesday. Sania was among four second-round upset winners at the event. Sania broke her opponent four times while losing serve just once.Sania's quarterfinal opponent will be China's Zhang Shuai on Friday.