Serena Williams avoided another Grand Slam defeat by Spain's Garbine Muguruza as she fought back to reach the Australian Open quarter-finals.
The American world number one, who lost to Muguruza at last year's French Open, came through 2-6 6-3 6-2.
Williams next faces Slovakia's Dominika Cibulkova, who beat two-time champion Victoria Azarenka 6-2 3-6 6-3.
Defending men's champion Stan Wawrinka beat Guillermo Garcia-Lopez 7-6 (7-2) 6-4 4-6 7-6 (10-8).
And Madison Keys backed up her win over fourth seed Petra Kvitova by beating fellow American Madison Brengle 6-2 6-4
