Simplify the following text for a Grade 9 native English-speaking person.
Original: Cara Black and Liezel Huber were the defending champions , but Serena Williams and Venus Williams defeated them in the final 6 -- 2 , 6 -- 2 .
Simplified: Cara Black and Liezel Huber were the defending champions , but Serena Williams and Venus Williams defeated them in the final 6 â `` 2 , 6 â `` 2 .