The Wimbledon runner-up sealed a 6-2 6-7(2) 6-4 win to book her place in the last 16 at Flushing Meadows under the lights in New York.
The support, the screaming, the chants, it’s amazing
Bouchard, 20, joins Maria Sharapova as the only players on the WTA to reach the fourth round or better at all four Grand Slams this season.
“It was special tonight,” said seventh seed Bouchard. “I felt so much energy on the court.
“I’ve never felt that much energy on any other tennis court in the world. So it was an unbelievable feeling playing on Arthur Ashe tonight.
“The support, the screaming, the chants, it’s amazing. It’s so motivating. I wish I could play on a court like this every day. That’s what makes the US Open so special.”
The Canadian will take on Russian Ekaterina Makarova on Monday for a place in the quarter-finals.
Elsewhere, Jelena Jankovic dropped just one game as she breezed through to the fourth round with a 6-1 6-0 win over Johanna Larsson of Sweden.
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