Despite the loss in the 29th career meeting between the two sisters, Serena, who is still shaking off the rust after a long layoff, leads their career series 17-12.
A dominant performance seemed to cast aside any doubts there may have been about Rafael Nadal's form brought about by last year's injuries.
Belinda Bencic beats Venus Williams in the Australian Open first round. The 6-3, 7-5 loss for Venus Williams was her first in five career meetings with Bencic, who lost to Serena in the first round last year.
According to US media, Florida police conclude neither driver was at fault and no charges will be filed in collision which the tennis star was involved in, in June, killing one passenger.
Hingis on Saturday won the mixed doubles title with Britain's Jamie Murray and on Sunday the women's doubles title with Taiman's Chan Yung-Jan.
Sloane Stephens beat Madison Keys 6-3 6-0 in an all American US Open final to claim her maiden grand slam title.
Americans Sloane Stephens and Madison Keys, both struggling with serious injuries, advance to their first Grand Slam final at the US Open.
For the first time since 1981, the US Open women's semi-finals will be an all-American affair with seven-time Grand Slam champion Venus Williams and three first-Slam-title hopefuls in the mix.
The 37-year-old Williams might be in the twilight of a sparkling career, but given the opportunity she can still shine.
Due to injuries, from "overuse," five of the world's top 11 men's players will miss this year's US Open, which gets under way on Monday. The problem is that the gruelling season is just too much wear and tear on the athletes' bodies.
She demolished Venus Williams 7-5 6-0 to become the first Spaniard to claim win to Wimbledon since Conchita Martinez 23 years ago
Spain's 23-year-old Muguruza will meet 37-year-old Venus Williams. It will be Muguruza's second Wimbledon final. She was defeated by Venus' sister Serena, a seven-times winner in 2015.
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