Korean Hyung-Taik Lee celebrates a four-set win over Britain's Andy Murray, the 19th seed

Murray's familiar temper got the better of him as he lost to Hyung-Taik Lee

Second seed Maria Sharapova struggles with her serve as she drops the opening set against Agnieszka Radwanska

The defending champion levels the match and goes a break up in third set but pays the price for too many unforced errors

Teenager Radwanska can hardly believe it as she beats Sharapova to cause the shock of the tournament so far

And it proves to be a good day for teenagers as 18-year-old Belarussian Victoria Azarenka beats Martina Hingis

Ten years after she won her only title in New York, Hingis is sent packing in the third round

Austria's Tamira Paszek. who is only 16, sends 11th seed Patty Schnyder tumbling out in three sets

But 18-year-old Nicola Vaidisova finds herself on the end of an upset late on Saturday

Vaidisova, the 13th seed, loses a thrilling night match 6-4 3-6 7-6 to Israel's Shahar Peer

Fourth seed Nikolay Davydenko breezes into the fourth round with a straight-sets victory over Nicolas Almagro

Former champion Andy Roddick was in fine form, dropping just five games against Thomas Johansson

Anna Chakevetadze looks to the heavens as she seals victory over India's Sania Mirza 6-2 6-3

Top seed Roger Federer struggles to get his racquet on the ball against big-serving American John Isner

The 6ft 9in Isner threatens to cause an upset when he pinches the first set against Federer on a tie-break

But Federer responds in style, wrapping up a 6-7 6-2 6-4 6-2 win to book a fourth-round meeting with Feliciano Lopez