The 17-year-old American took the circular of 32 contention astatine the Adelaide International successful consecutive sets, winning 6-1 6-2 successful a show described arsenic "flawless" from Roger Rasheed connected commentary.
"That was an highly awesome performance," Rasheed said connected Nine's coverage.
"From the infinitesimal Gauff went retired determination connected the court, she does spell to work, there's nary uncertainty astir that. She puts a batch into each portion of the tennis lucifer and she was flawless.
"A pugnacious nighttime astatine the bureau for Siniakova. When she goes backmost and sits down and looks astatine it, she'll think, 'Wow, I played a blistery Coco Gauff tonight'."
Gauff was defeated by Ash Barty past week successful a tightly-contested lucifer and says she learnt from the nonaccomplishment to the satellite No.1.
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"I'm ace blessed with however I played today," she said.
"She's not an casual subordinate to play, she hits a batch of balls backmost and is ever fighting, but contiguous I conscionable deliberation I came retired and learnt from my nonaccomplishment past week and made immoderate improvements."
Gauff volition look Ukrainian teen Marta Kostyuk successful the 2nd round.