The two-time Wimbledon champion blazed her way into the quarter-finals with an emphatic straight sets win over 17-year-old Amanda Anisimova.
Collins had never won a match at grand slam level before this year's Australian Open.
"I can say it again, that she played really one of her best matches", Kerber snapped.
The Czech eighth seed downed the unseeded American 6-2, 6-1 to match her best performance at a major since being slashed in a terrifying attack at her home in late 2016 that left her with lasting nerve damage in her fingers.
When Kerber, a three-time Grand Slam champ, became increasingly vocal after taking a point from Collins on an unforced error in the second set, Collins made it clear she would not be intimidated, yelling, "Come on!" after hitting a drop-shot victor and slowing Kerber's momentum.
World number two Angelique Kerber was sensationally bundled out of the Australian Open yesterday by a woman playing the event for the first time, as a rampant Rafael Nadal powered into the quarter-finals.
"I had some tough situations a year ago", Collins said.
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If the justices do decide to take up the matter, the earliest it would be heard is in October , the court's next session. With the lower courts ruling against the administration and the high court not yet taking action, DACA remains in place.
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This is a good thing, even though I know he wants to play a full schedule, and I hope we see more of it as the year rolls on. Mickelson finished with five birdies - draining a six-footer at 15th and a 10-footer at 16th to regain a share of the lead.
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We take a look at few of the interesting numbers ahead of the series to figure out how close the series could turn out to be. India not only have a strong top-order but they also have players in the middle-order who can finish matches for them.
The normally unflappable German lost her cool on court as Collins dismantled her 6-0, 6-2 in less than an hour and bristled afterwards when questioned about the loss.
The man Federer beat in last year's final, sixth seed Marin Cilic, was also sent packing by Spain's Roberto Bautista Agut, who now plays Tsitsipas in the quarter-finals.
"Always you see it with the important points, the key points are there", she said.
"I may not have won a grand slam match before this but I tell you, it's going to keep happening", she said.
"All kudos to my coaching squad over there in the corner, they gave me a plan and I just did the job".
Australian tennis player and cricketer Ashleigh "Ash" Barty beat 30th seed Sharapova 6-4, 1-6, 4-6.
She's now on a nine-match winning streak - her four wins here come after a title run in Sydney last week - and is into the Australian Open quarterfinals for the first time since 2012.