WIMBLEDON, England — Venus and Serena Williams won in straight sets today to set up their third all-sister Wimbledon final and seventh Grand Slam championship matchup.

Defending champion and four-time winner Venus beat Elena Dementieva 6-1, 7-6 (3), and two-time champ Serena then overcame two rain delays and served 14 aces to down China's Zheng Jie 6-2, 7-6 (5).

It will be the first all-Williams final since 2003, when Serena beat Venus in the championship match for the second year in a row.

Serena holds an 8-7 career edge over Venus, including 5-1 in Grand Slam finals. Since Venus won the U.S. Open in 2001, Serena has won five straight of their major finals.