• Aleksandra Krunic of Serbia celebrates beating Petra Kvitova
  • and falls to the ground in disbelief
  • Petra Kvitova, meanwhile, can't look
  • Novak Djokovic was out early too
  • and Sam Querrey found the Serb too hot in the early stages
  • Andy Murray also hit the ground running against Andrey Kuznetsov
  • The British number one cruised to the first set 6-1
  • Despite losing a set, Andy Murray was all smiles after a comfortable win
  • Serena Williams celebrates after defeating Varvara Lepchenko
  • Eugenie Bouchard celebrates afetr beating Barbora Zahlavova Strycova 6-2 6-7 (2/7) 6-4.
  • It proved to be a painful exit for Zahlavova Strycova
  • Tommy Robredo celebrates victory over Nick Kyrgios
  • Home favourite John Isner found the going tough against  Philipp Kohlschreiber ...
  • And it was the German who won in four sets.
  • Jo-Wilfried Tsonga set up a meeting with Andy Muuray after defeating Spaniard Pablo Carreno Busta.
  • Kaia Kanepi enjoyed a comfortable win over Carla Suarez Navarro
  • Victoria Azarenka (right) kisses Elena Vesnina after her thumping 6-1 6-1 victory.

US Open - Day Six

Aleksandra Krunic of Serbia celebrates beating Petra Kvitova