Gauff will next face No. 16 Belinda Bencic or Australian Priscilla Hon in the WTA 1000-series tournament.
In earlier matches Sunday, Eva Lys beat No. 10 Elena Rybakina 6-3, 1-6, 6-4 and American McCartney Kessler was leading Barbora Krejcikova 1-6, 7-5, 3-0 when the Czech player retired from the match.
The tournament is being held concurrently with an ATP 500 men’s tournament.
Second-seeded Alexander Zverev rallied from a break down in the deciding set to defeat 37th-ranked Corentin Moutet 7-5, 3-6, 6-3 to set up a quarterfinal matchup against Daniil Medvedev, who got past Alejandro Davidovich Fokina 6-3, 6-3.
A day after becoming the latest tennis star to make an apology to Chinese fans, Lorenzo Musetti had a straight-sets victory over tour veteran Adrian Mannarino 6-3, 6-3 in a second-round match.
Earlier, Learner Tien beat Flavio Cobolli 6-3, 6-2 to set up a meeting with the No. 9-ranked Musetti in the quarterfinals.
Japan Open: Alcaraz's record
Carlos Alcaraz comfortably defeated Brandon Nakashima 6-2, 6-4 to reach the semifinals of the Japan Open with his 65th match win of the season to equal his personal-best tally in a single season, according to the ATP Tour. He also had 65 wins in 2023.
“It’s great to go through, to play another semifinal,” the 22-year-old Alcaraz said. “It’s special because it’s the first time I am playing here in Japan and here in Tokyo, so to reach the semifinals in my first appearance is something great.”
Alcaraz will next face Casper Ruud, the fourth-seeded Norwegian who defeated Aleksandar Vukic 6-3, 6-2.
___
AP tennis: https://apnews.com/hub/tennis