Rafael Nadal ramped up his quest for a fourth US Open title with an impressive win over 2014 champion Marin Cilic to advance to the quarter-finals while Alexander Zverev slumped to a four-set defeat. Second seed Nadal -- the winner at Flushing Meadows in 2010, 2013 and 2017 -- produced some electrifying moments of brilliance to end the challenge of Croatia's Marin Cilic 6-3 3-6 6-1 6-2 on Monday.
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. Matteo Berrettini became just the second Italian man to progress to the US Open quarter-finals, 42 years after Corrado Barazzutti's run to the last four in New York. 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.
Berrettini went one step further than his run to the last 16 at Wimbledon in July, where he was beaten by Roger Federer. 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.