"It is better to take a bit more time, and when you come back to the competition, you are ready to be yourself - win or lose is another thing - but at least be yourself and be at the top of what you can do". This was her 23rd Grand Slam singles title, surpassing Steffi Graf's Open Era record of 22. "With that being said I am disappointed to say I've decided not to compete in The Australian Open this year".
The 23-time Grand Slam victor played her first match since giving birth at the World Tennis Championship in Abu Dhabi on December 30, losing her exhibition match to reigning French Open Champion Jelena Ostapenko.
Australian Open Tournament Director Craig Tiley said: "The true champion Serena is has been demonstrated in the herculean efforts she has made over the past few months in her desire to play the Australian Open".
On Thursday, Britain's Andy Murray pulled out of the tournament, which starts on 15 January. "I appreciate the support and understanding of my fans and everyone at the Australian Open".
Williams' absence, while disappointing for fans and officials, raises the prospect of another first-time grand slam victor making their mark in Melbourne.
Flier assaulted woman with wife in next seat
Ramamoorthy's wife had at this point walked up to the back of the plane to inquire into the incident, the attendants added. The miscreant was seated in the middle seat next to his wife, with 22-year-old victim seated in the window seat.
On Thursday, men's world number 22 Kei Nishikori withdrew because of a wrist injury.
Russell Fuller, BBC tennis correspondent It is less than four months since Williams gave birth.
Despite the fact that Williams has turned down a wildcard for one of the last warm-up tournaments before the tournament begins, Tiley apparently remains fairly sure that the American will be back to defend her title.
Williams might be "super close" but she doesn't yet think she is in championship-winning shape.