Jarkko Nieminen falls to the floor after defeating Fernando Verdasco to reach his first Grand Slam quarter-final

Lleyton Hewitt enjoyed an easy passage into the last eight after a solid win over Dominik Hrbaty

It is thirsty work for Hewitt's pregnant wife Bec, who is due to give birth in October, as she watches courtside

Dominik Hrbaty is left to reflect on a bad day at the office against Hewitt after his errors cost him the match

A lacklustre Roger Federer is stretched by Nicolas Kiefer in their fourth round encounter in New York

Kiefer produces some good passing shots and pace and shows his delight as he is rewarded with the second set

Kiefer and Federer swap notes after the Swiss world number one prevails in their testing match

Top seed Maria Sharapova is made to work hard by fellow Russian Nadia Petrova but she goes through to the last four

It is tough luck for Nadia Petrova after her gritty performance is not enough to see off Sharapova

Kim Clijsters had an almighty tussle against Venus Williams and she bounced back from a set down to win