Serena Williams seeking to win Australian Open for sixth time . Her last victory in Melbourne grand final came in 2011 . World No . 1 will begin her new season against Andrea Petkovic . Caroline Wozniacki pulled out of Brisbane event due to injury .
Serena Williams seeking to win Australian Open for sixth time . Her last victory in Melbourne grand slam came in 2010 . World No . 1 will begin her new season against Andrea Petkovic . Caroline Wozniacki pulls out of Brisbane event due to injury .