Czech seventh seed Pliskova powers into Open quarters


Czech seventh seed Karolina Pliskova marched into the Australian Open quarter-finals for the third straight year Monday with a commanding straight sets win over 18th seed Garbine Muguruza of Spain. 

Former world number one Pliskova triumphed 6-3, 6-1 to set up a quarter-final meeting with either world number one Simona Halep or 23-time Grand Slam champion Serena Williams.