Garbine Muguruza beats Kiki Bertens in straight sets 6-3, 6-3 on Rod Laver Arena to book her place in the Australian Open quarter-finals. It took just over an hour for Muguruza to dispatch Bertens and the Spaniard will now play either Angelique Kerber or Anastasia Pavlyuchenkova in the quarter-finals. The 26-year-old Spaniard, who was rusty before the tournament after withdrawing from Hobart with a virus and then lost the first set of her first round clash with Shelby Rogers 6-0, was almost unstoppable on Monday. Muguruza got off to a fast start, winning the first set in half an hour. And it only took eight minutes longer – 38 minutes – for the 26-year-old to take the second. Muguruza created 18 forced errors from Bertens to go a break and a 4-2 lead, before winning the match on the ninth seed's serve at the third attempt. "Kiki is a tough opponent," she said in her on-court interview. "We've played many matches and all of them are battles so I was just getting ready to have a tough match and concentrate here. "Every day I'm feeling a little bit better. The first day I was not feeling well at all but with all my team working to take care of my body each days my health is improving."