Bianca Andreescu needed just 67 minutes to sweep aside lucky loser Greet Minnen and reach the US Open fourth round.
The Canadian sixth seed, who is finding her way back from a long-term knee injury, beat the Belgian 6-1 6-2.
Champion in 2019, the 21-year-old has now won her past 10 main draw matches in New York.
She faces an intriguing last-16 match against French Open semi-finalist Maria Sakkari after the Greek beat a patchy Petra Kvitova 6-4 6-3.
Czech 10th seed Kvitova made 34 unforced errors compared to just 16 winners as she struggled for consistency.