British number one Johanna Konta was in devastating form to beat China's Zhang Shuai and reach the US Open fourth round.
The 29-year-old won 6-2 6-3 in 71 minutes to reach the last 16 for the third Grand Slam in a row.
Konta, ranked 16th in the world, will face Czech third seed Karolina Pliskova for a place in the quarter-finals.
She is the last Briton left in the singles at Flushing Meadows after Dan Evans lost to Roger Federer earlier.
"I'm really pleased. I am playing tough opponents and every match is difficult," she said.