The 27-year-old won the 2018 French Open having lost in three previous Grand Slam finals, including the 2018 Australian Open, reports Efe news.
"It's a big difference inside myself because I did what I wanted to do," she told a press conference after being asked if she felt any difference ahead of her Australian Open campaign. "I won a grand slam finally, and now I can say I'm a real number one," Halep expressed.
"It's tough to change the person I'm working with every day", she said adding: "I wanted to feel that I'm ready to take another challenge, because every time you commit to someone in your team you have to give 100 percent.
Halep will face Estonian Kaia Kanepi in the first round of the Australian Open.
Their last meeting in the first round of last year's US Open, ended in a straight sets defeat for the Romanian.
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