Defending champions Serena and Venus Williams thrashed the top seeds to secure their place in the Wimbledon women's doubles final and now face a busy Saturday schedule.

The sisters will contest Saturday's singles final and then go back out later in the day to take on Australians Samantha Stosur and Rennae Stubbs in the doubles.

Williams and Williams took apart the game of Zimbabwe's Cara Black and American Liezel Huber to win 6-1 6-2 on Court One on Friday.

The tone was set from the start as the American pair, seeded fourth, won the opening five games, and the Black-Huber team could not fight back in the second set.

Chasing a fourth doubles title at Wimbledon, after triumphs in 2000, 2002 and 2008, the Williamses will face a team who had a far trickier semi-final.

Third seeds Stosur and Stubbs were 6-7 (7/3) 6-4 6-2 winners against the second-seeded Spanish pair of Anabel Medina Garrigues and Virginia Ruano Pascual.