Coco Vandeweghe has said that her hard work over the last year has paid off, after she beat Samantha Stosur in the Australian Open second round.
She told reporters: "Last year I lost in the first-round in the qualies here so it's big difference, but I have made improvements to my game and I put in the hard work, especially last year and in the off-season this year.
"I have played Madison maybe twice in a challenger or two, so I haven't played her for a while. It's kind of a new thing to play her in a Grand Slam so I will be as ready as I can."
Vandeweghe has risen to 37th in the rankings this season.