The results of the Australian Open women's singles Sunday are as follows:
Fourth round results (prefix denotes seeding), according to Xinhua.
28-Flavia Pennetta, Italy, beat 9-Angelique Kerber, Germany; 6-1, 4-6, 7-5
4-Li Na, China, beat 22-Ekaterina Makarova, Russia; 6-2, 6-0
14-Ana Ivanovic, Serbia, beat 1-Serena Williams, United States; 4-6, 6-3, 6-3
Eugenie Bouchard, Canada, beat Casey Dellacqua, Australia; 6-7 (5/7), 6-2, 6-0