It was a rollercoaster ride for Kim Clijsters and Gael Monfils at Pat Rafter Arena.
In the first match of the night, the first-seeded Belgian battled hard an hour and 25 minutes to earn a 6-1 0-6 6-4 win over resilient Czech Lucie Safarova. Clijsters will now face revelation player Andrea Petkovic from Germany in the semifinals.
Later on, Gael Monfils overcame his shoulder difficulties to produce a notable victory over a solid James Blake in three sets, 3-6 6-3 6-4.