Serena Williams is on a mission to win what would be a fourth major in a row, a sixth Wimbledon and a 21st Grand Slam title. After beating sister Venus, she now plays two-time Australian Open champion Victoria Azarenka.
Maria Sharapova, meanwhile, faces big-serving American Coco Vandeweghe. The Russian is yet to drop a set at this year's tournament.
Maria Sharapova (RUS) [4] v Coco Vandeweghe (US) today on Centre Court.
Vandeweghe's compatriot Madison Keys is hotly tipped to one day emulate her coach Lindsay Davenport and become a Wimbledon champion. Blocking her path is 2012 finalist Agnieszka Radwanska.
The winner of that match takes on the victor of the other quarter-final between Spain's Garbine Muguruza and Switzerland's Timea Bacsinszky.
Meanwhile, defending men's champion Novak Djokovic resumes his fourth-round match with Kevin Anderson at 13:00 BST on Court One, with the number one seed having battled back from two sets down to level before play was stopped for bad light yesterday.
