Vinci of Italy looks up after challenging a line call during her women's singles quarter-final match against Stosur of Australia at the WTA Dubai Tennis Championships

 
Vinci of Italy looks up after challenging a line call during her women
Roberta Vinci of Italy looks up after challenging a line call during her women's singles quarter-final match against Samantha Stosur of Australia at the WTA Dubai Tennis Championships, February 21, 2013. REUTERS/Jumana El Heloueh