New York - American 17th seed Sam Querrey reached his first US Open quarter-final on Sunday with a 6-2, 6-2, 6-1 win over 23rd-seeded Mischa Zverev of Germany.
Querrey, a semi-finalist at Wimbledon in July, will face South Africa's 23rd-seeded Kevin Anderson for a place in the semi-finals.
Querrey defeated Anderson in the fourth round at Wimbledon but Anderson gained revenge at the Montreal Masters last month.
On Sunday, the 29-year-old Querrey fired 18 aces, 55 winners and committed just eight unforced errors, winning in just 77 minutes.
Results from day 7 of the US Open on Sunday (x denotes seeding):
Sam Querrey (USA x17) bt Mischa Zverev (GER x23) 6-2, 6-2, 6-1
Kevin Anderson (RSA x28) bt Paolo Lorenzi (ITA) 6-4, 6-3, 6-7 (4/7), 6-4
Pablo Carreno-Busta (ESP x12) bt Denis Shapovalov (CAN) 7-6 (7/2), 7-6 (7/4), 7-6 (7/3)
Diego Schwartzman (ARG x29) bt Lucas Pouille (FRA x16) 7-6 (7/3), 7-5, 2-6, 6-2
Venus Williams (USA x9) bt Carla Suarez Navarro (ESP) 6-3, 3-6, 6-1
Petra Kvitova (CZE x13) bt Garbine Muguruza (ESP x3) 7-6 (7/3), 6-3
Sloane Stephens (USA) bt Julia Goerges (GER x30) 6-3, 3-6, 6-1
Anastasija Sevastova (LAT x16) bt Maria Sharapova (RUS) 5-7, 6-4, 6-2