US Open tennis: the best of the action from day five

A court attendant holds an umbrella over Andy Murray as rain disrupts the opening exchanges of his match with Dustin Brown of Jamaica Photograph: Kathy Willens/AP Dustin Brown exhibits his unorthodox style Photograph: Chris McGrath/Getty Images Andy Murray feels a twinge in his back and gives an impromptu tribute to the famed Athena "Tennis Girl" poster Photograph: Kathy Willens/AP Dustin Brown celebrates winning a point against Andy Murray Photograph: Stan Honda/AFP/Getty Images Ultimately there's little for Brown to celebrate as Murray sweeps him aside 7-5, 6-3, 6-0 Photograph: STAN HONDA/AFP/Getty Images Ana Ivanovic of Serbia gives a cheeky smile after defeating Virginie Razzano of France Photograph: Kevin Lamarque/Reuters Elena Dementieva of Russia serves during her match against Daniela Hantuchova of Slovakia Photograph: Kevin Lamarque/Reuters Hantuchova hides her head during a break as she succumbs 7-5, 6-2 to Dementieva Photograph: Kevin Lamarque/Reuters Denis Istomin of Uzbekistan, during a tightly fought tie-break in the second set in his match against Rafael Nadal Photograph: Charles Krupa/AP The world no1 went on to take the match in straight sets Photograph: Mehdi Taamallah/PA Petra Kvitova of the Czech Republic had the unenviable task of taking on Kim Clijsters, twice champion at Flushing Meadows Photograph: Justin Lane/EPA American Sam Querrey serves on his way to victory over Marcel Granollers of Spain. Querrey is a potential fourth-round opponent for Andy Murray Photograph: John G. Mabanglo/EPA Anna Allberry, 9, of Steamboat Springs, Colorado, balances an outsized tennis ball on her head as she walks past the Arthur Ashe Stadium prior to the match between Venus Williams and Mandy Minella Photograph: Charles Krupa/AP It's a packed house inside the stadium for Williams's encounter with Minella Photograph: Andrew Burton/Getty Images Chelsea Clinton and her husband Marc Mezvinsky make up part of that audience Photograph: Andrew Gombert/EPA Williams unleashes a forehand as her outfit glisters in the evening light Photograph: Emmanuel Dunand/AFP/Getty Images Minella wisely keeps her eyes shut as she congratulates Williams on her victory, lest she jeopardise her future sporting career Photograph: Andrew Gombert/EPA