After barely breaking a sweat in reaching the last 16, a run that included a second-round walkover, Nadal stared down his stiffest test so far to surge into a quarter-final meeting with Argentine 20th seed Diego Schwartzman. The Spaniard exchanged the first two sets with Cilic but grasped control by breaking for 3-1 in the third, a series of dazzling winners drawing an animated fist-pump from golf legend Tiger Woods at Arthur Ashe Stadium.
Nadal's path to the final sees him take on Schwartzman next after the 5ft 7in (1.70m) Argentine chopped down sixth seed Zverev. Zverev rolled through the opening set against Schwartzman under the roof on Ashe during a rainy afternoon session, but he lost his way to go down 3-6, 6-2, 6-4, 6-3.
Berrettini, the 24th seed, eased to a 6-1, 6-4, 7-6 (8/6) win over Russia's 43rd-ranked Andrey Rublev to reach the last eight at a Grand Slam for the first time. "It's something really crazy. I cannot believe it right now. I need a few hours to understand what happened," said Berrettini, 23, who goes on to play French 13th seed Gael Monfils. Monfils, a 2016 US Open semi-finalist, crushed the 33-year-old Andujar's bid to become the oldest player in the Open era to reach his first Grand Slam singles quarter-final with a 6-1, 6-2, 6-2 rout.