In Adelaide, the WTA went inside Simona Halep's practice as she took to the court with coach Darren Cahill.

"Every time you yell at me it's going to cost you a couple hundred dollars," Cahill warned his star pupil.

He was referring to her pledge to donate $200 for every time she gives him a hard time—though it's for during her matches.

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Halep opened her 2020 season with a win over Ajla Tomljanovic, but then lost to Aryna Sabalenka. She's the No. 4 seed in Melbourne, where she'll open against Jennifer Brady.

WTA goes inside a
practice with Halep
and Cahill

WTA goes inside a practice with Halep and Cahill