WATCH—Highlights from Ashleigh Barty's win over Simona Halep in Sydney:

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Ashleigh Barty says self-belief propelled her win against world No. 1 Simona Halep in Sydney, and it's also why the Australian is aiming to reach the Top 10 this season.

The 22-year-old had dropped back-to-back matches against the top-ranked Halep during the hard-court season, but she was aware that her opponent was playing her first match in months and took advantage of the court’s difficult conditions with her slice and unusual style of play.

"I certainly fear no one and I know I can go and match up with the world's best," Barty told the local press following her win.

"She gave me a belting in Montreal. I learned a little bit more in Cincinnati, but today I knuckled down and really thought about it and really gave myself a chance. The biggest thing, I believed that I could I win."

Barty stepped away from the game in her teens, saying she was not enjoying the game and experiencing motivation problems. Since returning in 2016, she has reached the Top 15 in the rankings and now wants to do more.

She said her previous two seasons have "been extremely consistent, which I’m really, really pleased about but the next goal for me is Top 10 and to go deep in singles in Slam events."

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