US Open order of play - day nine

Day nine of the US Open will see the women compete for semi-final slots, while the men will battle it out for places in the quarter-finals.

The likes of Novak Djokovic, Maria Sharapova and the retiring Andy Roddick will all be in action before the close of play.

Sports Mole brings you the order of play as the tournament at Flushing Meadows reaches a critical stage.

Arthur Ashe Stadium (4pm start)

Victoria Azarenka vs. Samantha Stosur - quarter-final Maria Sharapova vs. Marion Bartoli - quarter-final Stanislas Wawrinka vs. Novak Djokovic - round four Juan Martin Del Potro vs. Andy Roddick - round four

Louis Armstrong Stadium (6pm start)

Richard Gasquet vs. David Ferrer - round four Janko Tipsarevic vs. Philipp Kohlschreiber - round four