Serena, Kuznetsova uncertain of playing Australian Open

FILE PHOTO: Tennis - Australian Open - Melbourne Park, Melbourne, Australia - 28/1/17 Serena Williams of the U.S. hits a shot during her Women's singles final match against Venus Williams of the U.S. .REUTERS/Thomas Peter/File Photo

(Reuters) - Former world number one Serena Williams has yet to make a decision about her participation at the Australian Open, while world number 12 Svetlana Kuznetsova is also a doubt for the first grand slam of 2018 after undergoing wrist surgery.

Williams was around two months pregnant when she captured her 23rd grand slam singles title in Melbourne earlier this year and was hoping to defend her crown next January following the birth of her daughter in September.