Viviani , 17 , smacked a ball in anger after dropping the first set against Chinese opponent Xin Yu Wang .
Viviani , 17 , was dismissed from the court despite raising her arm signalling an apology after it hit a ball kid in the chest area .
Viviani , 17 , smacked a ball in anger after dropping the first set against Chinese opponent Xin Yu Wang and was dismissed from the court despite raising her arm signalling an apology after it hit a ball kid in the chest area .