Venus Williams staged a spirited comeback to down third seed Petra Kvitova 4-6, 7-5, 6-4 and reach the third round of the BNP Paribas Open in Indian Wells on Saturday.
Serena Williams squandered four match points and blew a 5-1 lead in the decider to fall to seventh seed Karolina Pliskova 6-4 4-6 7-5 in the quarter-finals of the Australian Open.
Images from Day 5 of the French Open, at Roland Garros, in Paris.
Zverev's serve played a big role in the victory, his third of the year, as the World No 3 won all but two of his first-serve points in the final, which lasted 74 minutes.
Images from Day 4 of the Australian Open in Melbourne on Thursday
A summary of sports events and persons who made news on Friday
Images from Day 9 of the 2020 French Open at Roland Garros, in Paris, on Monday.
Cycling: Olympic champion Vogel stable after operation
Second seed Sloane Stephens was shocked 2-6, 6-4, 6-2 by Germany's Andrea Petkovic in the second round of the Citi Open on Wednesday, disrupting the American's buildup to her US Open title defence.
Former world number one Garbine Muguruza was beaten 7-5, 6-4 by Aryna Sabalenka in the China Open second round on Tuesday while an ailing Jelena Ostapenko lost 6-0, 6-0 to Wang Qiang.
Fifth seed Maria Sharapova averted an early exit on a sweltering day in Flushing Meadows. Updates from Wednesday's play.
Two-time Grand Slam winner Victoria Azarenka crashed out of the French Open in the first round losing 5-7, 5-7 to Katerina Siniakova on Monday, playing only her fifth tournament of the year after a legal battle over the custody of her son.
The returning Scot also announced his withdrawal from next week's Rogers Cup in Toronto.
Images from Day 5 of the Australian Open in Melbourne on Friday.