Coco uses up challenges to gauge range

In the second set of her 6-2, 7-6 (4) loss to Channelle Scheepers at the Mercury Insurance Open in Carlsbad, California, Coco Vandeweghe admits to using all of her Hawk-Eye challenges so she could see how far her balls were going out on the video screen.

"I didn’t think they were in," said Vandeweghe, who had reached the final of Bank of the West Classic on Sunday. "I didn’t need any [challenges]. I hope the linesman and the umpires do their jobs well and I will leave it in their hands. I just needed that feeling of seeing where the ball was landing and how far I was missing in the court to help me get the range, because I wasn’t feeling how far I was missing it."

Vandeweghe, who admitted to being to emotional during the match, refused to shake the chair umpire's hand after the match.

"I just didn’t think she was doing a great job," Vandeweghe said. "Everyone is human and is going to make mistakes, but I personally I didn’t think she did so well in the chair."