In a topsy-turvy encounter, the Swiss player looked set for victory when she led 2-0 in the deciding set. But Dechy stormed back to win in just over two and a half hours and progress to the last four of a grand slam for the first time.
In hot, blustery conditions, Schnyder, a semi-finalist in 2004, snatched the first set thanks to one break of serve in the 12th
Dechy, appearing in her first grand slam quarter-final, dropped serve in the first game of the final set before breaking back twice to set up a semi-final against top seed Lindsay Davenport.