US Open Day 1

James Waterson reports on the news from the first day of the US Open. Wimbledon champion Petra Kvitovia fell 7-6, 6-3 in the first round to Alexandra Dulgheru of Romania, and Maria Sharapova had to rally from losing the first set to beat Heather Watson of Great Britain 3-6, 7-5, 6-3. On the men's side, America's top-ranked player, Mardy Fish, beat Tobias Kamke of Germany 6-2, 6-2, 6-1, and Alexandr Dolgopolov, Janko Tipsarevic, Tomas Berdych and Richard Gasquet were among the day's winners. Meanwhile, Novak Djokovic was named as UNICEF national ambassador for Serbia. His role will be to promote early childhood education and children's rights.