Defending champions Serena and Venus Williams defeated Cara Black and Liezel Huber 6-4 6-3 to win the Australian Open women's doubles title on Friday, maintaining the partnership's perfect record in grand slam finals.
The second-seeded Williams sisters continued their dominance over Zimbabwe's Black and American Huber, overcoming a sluggish start under bright sunshine at Rod Laver Arena to win in 86 minutes and seal their 11th grand slam doubles title.
The Williams sisters have now beaten the top-ranked pair in all three of their meetings, including the US Open final last year.
The title was the Williams sisters' fourth at Melbourne Park, where they also won in 2001 and 2003.
Serena will clash with Justine Henin for the women's singles title on Saturday.