"I'm just so happy with my game at the moment", she said.
Next up for Sharapova is a third-round matchup against 2017 French Open champion Jelena Ostapenko.
Meanwhile, Australian Open champion, Caroline Wozniacki joined Simona Halep in making a shock early exit.
"I mean, the second set - the first set I won". After Saturday's matches, 10 of the top 13 seeds are out of the women's draw.
Tsurenko has never been past the fourth round at any Grand Slam tournament. She's young and fearless, comes out swinging. The Czech has registered 15 Top 20 victories so far this season, one less than the wins she had posted across the previous two seasons combined, but she could do nearly nothing to prevent Sabalenka to explode and seal the 35th win of the season.
Tiafoe, an American, is ranked 44th, one spot ahead of de Minaur, an Australian.
He's made quick work of his opponents this year.
Tiafoe compared de Minaur to a "backboard" and acknowledged that he "lost my head" in the second set. I think over the time he got more frustrated.
From the start, the second set seemed like a different match. However at Flushing Meadows this year - they'll both smell blood.
The Frenchman was trailing 6-2, 5-4 when he stopped. Keys has had injury problems this year that have interrupted her US Open preparation.
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A year later, Nishikori might want to catch some U.S. Open highlights.
A furious Herbert said that Lahyani had over-stepped the mark.
USTA spokesman Chris Widmaier says the location for the statue has not been finalised and artist renderings are unavailable because Goulder "is still in the creative process". Larsson lost 1-2.
The No. 14 seed will play either Aleksandra Krunic or Kirsten Flipkens in the next round. She was eliminated by No. 29 seed Dominika Cibulkova 3-6, 6-3, 6-3.
Since Sharapova's book release previous year, we have been reminded of the fierce rivalry between these two champions. Now that the tables had turned, it was Cirstea who had to serve to stay in the match. Sharapova was just the more solid player when it counted, winning 2 of her 3 break point opportunities, while Cirstea went 0 for 6.
Up next, a potential rematch of the '14 final against No. 7 seed Marin Cilic, who faced 10th-seeded David Goffin later Monday. She fired 21 winners to seal her best Grand Slam result so far.
Also losing on Saturday was Wimbledon champion Angelique Kerber, the No. 4 seed.
Surging Serbian Novak Djokovic will look to book his ticket to the fourth round when he takes on France's Richard Gasquet also during the night session at the Arthur Ashe Stadium. Sabalenka recently won the Connecticut Open. In four appearances at Flushing Meadows, he has one loss in the first round, two in the second, and one in the third.
The extreme heat policy is in effect for the third straight day at the U.S. Open.
Throughout the match, Sharapova struggled with her serve and on several occasions had to save break points. The majority of those, 27 to be exact, came in the first set.
U.S. Open officials began the policy, which is a rule on the women's tour but not the men's, on Tuesday, when temperatures first soared into the mid-90s.
It wasn't always pretty, particularly in the first set.
Federer, 17-0 in second-round matches, faces Frenchman Benoit Paire. He faces another Frenchman, Nicolas Mahut.