Azarenka collapses on court

Number 10 seed Victoria Azarenka today collapsed on court during her second-round match against Gisela Dulko at the US Open.

On another sweltering day in New York, with temperatures again expected to approach 100 degrees fahrenheit, Azarenka slumped to the ground while serving at 15-30 and 5-1 down on the Grandstand Court.