(AP Photo/Dita Alangkara)
MELBOURNE, Australia (AP) Angelique Kerber is on her own in an elite club at the Australian Open.
The 2016 champion routed Maria Sharapova 6-1, 6-3 in a third-round win that showcased her credentials as a title contender and ensured she'll be the only Grand Slam champion still playing in the second week in the women's draw.
Roger Federer and Novak Djokovic were almost as ruthless in their straight-sets wins Saturday night, which is hardly surprising for two players with a combined 31 Grand Slam titles. As well, it was Federer's 90th match win at Melbourne Park.