Australian Open:Serena Williams and Venus Williams claimed their fourth Australian Open women's doubles title with a straight-sets win over top seeds Cara Black and Liezel Huber.
The sisters, who were the second seeds, won 6-4 6-3 to defend the title they won at Melbourne Park last year.
Serena Williams will also look to defend her singles title when she meets Justine Henin in tomorrow's final at Rod Laver Arena.