Azarenka explodes against hawk-eye: "It's a shitty system"

During her match against Qinwen Zheng at Indian Wells, Victoria Azarenka got frustrated with the hawk-eye after a ball that, according to her, bounced just behind the baseline but was called in by the hawk-eye.

Angry after this call, she had to receive a warning following an exchange with the chair umpire:

Azarenka: "This is bullshit. What's the point of hawk-eye? The ball is out."

Chair umpire: "I understand, but I can't do anything."

Azarenka: "I know you can't do anything, it's just a shitty system."

Chair umpire: "I have to give you a warning for that."

Azarenka: "Of course, I have to get it."