VIENNA — Alexander Zverev reached the quarterfinals at the Erste Bank Open by beating Marcos Giron 6-2, 7-5 on Wednesday for the German’s personal-best 61st win of the year.
The third-ranked Zverev, who is the top seed at the indoor hard-court tournament in the Austrian capital, will next face Lorenzo Musetti, who advanced when Gael Monfils withdrew from their second-round match because of an illness.
Zverev’s prior season high for wins was 60 in 2018.
Grigor Dimitrov beat Zhang Zhizhen 6-4, 7-5, and the third-seeded Bulgarian will face Tomas Machac on Thursday for a spot in the last eight.
Brandon Nakashima and Karen Khachanov also advanced on Wednesday.