Kerber was simply too good for the 17 - year - old in a 6 - 1 6 - 1 victory on Friday .
Kerber is bidding to become world number one at the year 's last grand slam .
Kerber , who is bidding to become world number one at the year 's last grand slam , was simply too good for the 17 - year - old in a 6 - 1 6 - 1 victory on Friday .