The world top four players have all won their quarter-final matches setting the stage for a possible all Williams final.
First, Venus Williams dismantled 20-year-old Agnieszka Radwanska of Poland in 1 hour 8 minutes. Then there was a short break and then Serena Williams, on Centre Court, made it two sisters in the semifinals.
With Venus watching, number two seed Serena took out Victoria Azarenka, the 19-year-old from Belarus, 6-2, 6-3.
Serena will play Elena Dementieva after the Russian fourth seed came through 6-2, 6-2 against Francesca Schiavone of Italy.
Top seed Dinara Safina will face the defending champion Venus.