Melbourne, Jan 22 (AFP) Results from the Australian Open on Sunday (x denotes seeding):

Results from the Australian Open on Sunday (x denotes seeding):
Men's singles
4th rd
Mischa Zverev (GER) bt Andy Murray (GBR x1) 7-5, 5-7, 6-2, 6-4
Stan Wawrinka (SUI x4) bt Andreas Seppi (ITA) 7-6 (7/2), 7-6 (7/4), 7-6 (7/4)
Jo-Wilfried Tsonga (FRA) bt Daniel Evans (GBR) 6-7 (4/7), 6-2, 6-4, 6-4

Roger Federer (SUI) bt Kei Nishikori (JPN) 6-7 (4/7), 6-4, 6-1, 4-6, 6-3
Women's singles
4th rd
Venus Williams (USA x13) bt Mona Barthel (GER) 6-3, 7-5
Anastasia Pavlyuchenkova (RUS x24) bt Svetlana Kuznetsova (RUS x8) 6-3, 6-3
Garbine Muguruza (ESP x7) bt Sorana Cirstea (ROM) 6-2, 6-3.