Bryan brothers, Williams sisters advance

Brothers Bob and Mike Bryan of Camarillo, the tops seeds in the OIympic tournament, won their first round doubles match in straight sets.
The Bryan brothers defeated Mark Knowles and Devin Mullings of the Bahamas, 6-2, 6-1 in 52 minutes. They will face either 2004 silver medalists Nicolas Kiefer and Rainer Schuttler of Germany or Austria's Julian Knowle and Jurgen Melzer in the second round.
Venus and Serena Williams each advanced to the third round in singles competition.
Fourth-seeded Serena defeated Samantha Stosur of Australia, 6-2, 6-0, in 44 minutes and will meet Alize Cornet of France in the round of 16.
Venus Williams advanced with a 6-1, 6-4 win over Iveta Benesova of the Czech Republic on Tuesday afternoon. Her next opponent will be the winner of the match between Casey Dellacqua of Australia and Victoria Azarenka of Belarus.