Serena Williams will defend her Australia Open title at Melbourne Park in January 2018 ? just four months after becoming a mum. A 23-time major champion, Williams has not competed since April after falling pregnant. She gave birth to Alexis Olympia Ohanian Jr in September ? her first child with fiancé Alexis Ohanian, the co-founder of Reddit. In 2018, the men's and women's winners at Melbourne Park will earn AUS $4 million (£2.36 million) payday ? up from $3.7 million in 2017.