Defending champion and No. 2 seed Camila Osorio chased every ball down en route to defeating Colombian compatriot Mariana Isabel Higuita Barraza in the Copa Colsanitas Zurich first round.
An all-American first round at the Credit One Charleston Open saw wild card Lauren Davis come from a set down to defeat qualifier Jamie Loeb, improving to 2-1 overall against her compatriot.
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