Kim Clijsters returns to defend her title and with Serena Williams injured she also starts as the favourite.
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Andy Murray heads to Flushing Meadows high on confidence but the men to beat will once again be Roger Federer and Rafael Nadal.
Roger Federer takes on Mardy Fish in the Cincinnati final as another successful week comes to a close.
American tennis has found some redemption in Cincinnati as Mardy Fish takes on Andy Roddick in today's semi-finals and we preview all four.
After a 17% profit from the first four days this week - and 19% for the past two weeks - we highlight four of today's quarter-finals.