Top US man and woman kept US tennis medal hope alive.
John Isner def. Olivier Rochus 7-6(1), 6-4
Serena Williams def. Jelena Jankovic 6-3, 6-1
Ryan Harrison and Donald Young lost their Olympic debut.
Andreas Seppi def. Donald Young 6-4, 6-4
Young remains winless on tour level since Februry (15-match losing streak)
Santiago Giraldo def. Ryan Harrison 7-5, 6-3
Ryan lost cool and destroyed his racquet after losing the match point.
Ana Ivanovic def. Christina McHale 6-4, 7-5
But Christina got to meet the First Lady after the match.
On two doubles US_ Brazil matches
Isner and Andy Roddick lost their opening doubles match against
Marcelo Melo and Bruno Soares of Brazil, 6-2, 6-4.
The other U.S. men's team, top-seeded Bob and Mike Bryan,
edged Brazilians Thomaz Bellucci and Andre Sa 7-6 (5), 6-7 (5), 6-3.