CoCo Vandeweghe overcame the heat and illness to beat 15th-seeded Roberta Vinci 6-1, 7-6 and advance to the second round of the Australian Open.Vandeweghe was down a break in the second set when she slumped to her knees, facing the backboard at Margaret Court Arena, and needed help from medical staff. The trainer rubbed some water on Vandeweghe’s neck as she stayed in the shade for a couple of minutes, not moving, before the tournament doctor went out to help.