Britain's Johanna Konta produced a commanding display to beat Belinda Bencic 6-2 6-1 and secure her place in the US Open fourth round in New York.
Konta, showing no sign of the health issues that affected her during the second round, brushed aside the Swiss 24th seed in 52 minutes.
Konta, ranked 13, reached the fourth round last year and made the Australian Open semi-finals in January.
The 25-year-old will face Latvia's Anastasija Sevastova in the next round.
Sevastova, ranked 48 in the world, beat Garbine Muguruza in the second round before overcoming Ukraine's Kateryna Bondarenko 6-4 6-1 in the third.