Ash Barty said she has "no regrets" as she addressed her shock retirement from tennis.

The 25-year-old told the world via a social media post on Wednesday she was walking away from the sport, less than two months after winning the Australian Open.

Speaking to reporters on Thursday, Barty said she wasn't "wasn't hiding anything" and she just felt the time was right to retire from tennis.

"I've said exactly what I wanted to say," she said.

"I'm an open book. I'm not hiding anything, I've got no secrets. I am just so proud of all of the work that I have done with my team.

"We have done this together right from the start, have enjoyed every single minute and we have no regrets. We have achieved so much together and it's been fun on the way.

"I just knew for me the time was right. I'd given absolutely everything that I could to this sport, and I knew that it wouldn't be fair to my team and the people that have invested so much time and energy into my life to not be 100 per cent commit for them.

"It's been a hell of a journey. I wouldn't change a thing and I certainly have no regrets."

After winning the Australian Open, Barty made the surprising call to pull out of major tournaments in the US due to an ongoing hip injury, but she denied that was a cover story while she contemplated retiring from tennis.

"No," she said. "That was an old injury that we repeatedly over my career had to manage, and that was the truth.