• Victoria Azarenka is made to battle hard by Ana Ivanovic in the early stages of their fourth round clash
  • Ivanovic impressed as she won the first set 6-4
  • ... but it was Azarenka who prevailed in a three-set thriller
  • Britain's Katy Dunne beat American Chloe Michele Ouellet-Pizer  6-3
6-1 in the Girls' Singles first round
  • Former champion Lleyton Hewitt rolled back the years in the early stages against  Mikhail Youzhny
  • Hewitt, the champion at Flushing Meadows 12 years ago, won the third set in a tie-break to open a two sets to one advantage
  • But Youzhny responded from 4-1 down in the fourth set to force a decider
  • And Youzhny again came from behind in the fifth set to complete victory in three hours and 58 minutes
  • Fifth seed Li Na became the first woman into the semi-finals with a 6-4 6-7 6-2 win over Ekaterina Makarova
  • Novak Djokovic raced into the quarter-finals for the seventh year in a row with a 6-3 6-0 6-0 demolition of Marcel Granollers
  • Friends in high places: David Schwimmer watches on Arthur Ashe Stadium with his wife Zoe Buckman
  • Serena Williams took no mercy on birthday girl Carla Suarez Navarro, thrashing her 6-0 6-0
  • Andy Murray was last on Arthur Ashe against Denis Istomin
  • The British No 1 was made to fight for his win but eventually came though in four sets...
  • ...And the relief was evident at the end of the match
  • Murray will face Stanislas Wawrinka in the quarter-finals

US Open - Day Nine

Victoria Azarenka is made to battle hard by Ana Ivanovic in the early stages of their fourth round clash