Serena and Venus Williams win their singles and doubles matches at the London International at Wimbledon . Americans could potentially meet in the singles semifinals of the grass - court season . World No . 1 Victoria Azarenka wins her singles match and could play Williams in the semifinals . Kim Warwick , Ana ##ity and Petra Kvitova advance into round three of singles competition .
Serena and Venus Williams win their singles and doubles matches at the London Olympics at Wimbledon . Americans could potentially meet in the singles semifinals of the grass-court tournament . World No . 1 Victoria Azarenka wins her opening match and could play Venus in the quarterfinals . Kim Clijsters , Ana Ivanovic and Petra Kvitova progress into round three of singles competition .