Serena on course to be best ever, says Venus Williams

Serena bludgeoned mercilessly past older sister Venus to reach her 11th Wimbledon quarter-final yesterday, as the two five-time champions locked horns for the first time in six years at SW19.
Reigning Australian and French Open champion Serena edged a step closer to the calendar grand slam by seeing off her in-form 35-year-old sister, to book a last-eight battle with Victoria Azarena.