No. 1 Carlos Alcaraz breezes into US Open quarterfinals - ESPN

NEW YORK -- Carlos Alcaraz had little trouble beating unseeded Matteo Arnaldi 6-3, 6-3, 6-4 on Monday to reach the US Open quarterfinals, the third time in as many appearances he has gotten at least that far at Flushing Meadows.

The No. 1-seeded Alcaraz, who is seeking to defend his title after winning Wimbledon in July, said afterward that he now prefers hard courts over any other surface and also likes playing under the Arthur Ashe Stadium roof. He enjoyed both against the 61st-ranked Arnaldi, an Italian player who proved little match for Alcaraz's power, which produced 31 winners and 22 unforced errors.

By advancing to the round of eight, the 20-year-old Spanish player became the youngest to reach three US Open quarterfinals in the open era that dates to 1968 and the only player other than Andre Agassi to do so before turning 21.

Alcaraz next faces No. 12 seed Alexander Zverev of Germany, who outlasted sixth-seeded Jannik Sinner of Italy 6-4, 3-6, 6-2, 4-6, 6-3 in a night match that lasted 4 hours, 41 minutes and ended early Tuesday morning.

A fan was ejected in the fourth set after Zverev complained to the chair umpire that the man used language from Adolf Hitler's Nazi regime. Zverev said after the match the spectator was singing Hitler's anthem.

In Louis Armstrong Stadium, eighth-seeded Andrey Rublev of Russia defeated Jack Draper of Britain 6-3, 3-6, 6-3, 6-4 to advance to his fourth US Open quarterfinals and the ninth Grand Slam quarterfinals of his career.

Rublev's quarterfinal opponent will be No. 3 seed and 2021 US Open champion Daniil Medvedev of Russia, who beat No. 13 seed Alex de Minaur of Australia 2-6, 6-4, 6-1, 6-2 in the night session.

The Associated Press contributed to this report.