Great Britain's number one Elena Baltacha has progressed through to the second round of the US Open after her opponent Jamie Hampton was forced to retire with a leg injury.
Both players had claimed a set each 6-2, but during the decider Hampton pulled up with a muscle complaint and was unable to continue.
Baltacha, 28, was leading at the time 5-1.
She will now face either Svetlana Kuznetsova or Sara Errani on Thursday.
