Serena reaches U.S. Open last 16 with milestone win

By Steve Keating NEW YORK (Reuters) - Another win, another milestone for Serena Williams who rolled into the U.S. Open last 16 on Saturday 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