Another win, another milestone for Serena Williams who rolled into the US Open last 16 by crushing Sweden's Johanna Larsson 6-2 6-1 to collect grand slam victory number 307 - the most by a woman in the Open era.
As in the majority of her victories at the majors, Williams operated with ruthless efficiency but displayed little fire as she coolly dispatched the 47th-ranked Swede in exactly one hour.

The victory moved the 34-year-old American past Martina Navratilova and level with Roger Federer for most grand slam victories by a man or woman.

Williams will go for number 308 and a step closer to what would be a record seventh US Open title when she meets Kazakhstan's Yaroslava Shvedova, a 6-2 7-5 winner over China's Zhang Shuai, in round four.