No. 2 seed Serena Williams of the US slipped into the second round with a 6-1, 7-5 victory over Portuguese qualifier Neuza Silva.
Portuguese teenager Michelle Larcher de Brito had been expected to cause a racket with her ear-splitting wails, but surprisingly turned on the mute button during her 6-2 7-5 defeat of Klara Zakopalova of the Czech Republic.
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