The Moscow-born Gavrilova, who only received her Australian passport in recent weeks, has been a breakout star at Melbourne Park, winning legions of new fans with her formidable game and sunny disposition.
But she had a centre-court tantrum against experienced Spaniard Carla Suarez in the fourth round on Sunday night. After winning the opening set 6-0, she lost focus to crash 6-3, 6-2 in the next two sets and lose.
"It wasn't great and I'm very disappointed with myself. I was being a little girl. Just, yeah, I'm very disappointed with myself," she said.
"I got emotionally fried in the second set. I was getting angry with myself, just showing way too much emotion.
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"I've never played that deep in a Grand Slam, so maybe that's why. (But) It's not acceptable. I don't know why I did that. I was terrible."
"I was very happy about that and proud. But, like I said, I'm very disappointed about tonight," she said of the Suarez match.
Since bursting into the spotlight in Melbourne, Gavrilova, the WTA's Newcomer of 2015, has had to deal with a huge amount of attention, a situation that has come as a shock.
But she is adamant she can deal with it.
"It's all happening for the first time in my life, so I just go with," she said. "I've got people that help me with everything. They're guiding me.