Defending champion Aryna Sabalenka extended her Australian Open winning streak to 15 matches on a rain-soaked opening day at Melbourne Park. Less than an hour of play was possible on the outside courts before a huge thunderstorm hit Melbourne Park, sending spectators running for cover and causing a delay of more than six hours.

Aryna Sabalenka has started her bid to become the first woman in a quarter-century to win three consecutive Australian Open titles with a 6-3, 6-2 victory over 2017 U.S. 2017 U.S. Open champion Sloane Stephens 6-3,

Aryna Sabalenka faced a former champion and some of her own demons in what proved to be a first-round match that was trickier than she and most observers expected.