Agassi survives battle with injured Dent

Andre Agassi survived his biggest test of the US Open thus far but got some help from Taylor Dent's injured right leg.

Top-seeded Agassi dropped the first set before rallying for a 6-7 (5-7) 6-4 7-5 victory over Dent, who was forced to retire after the third set due to tightness in his lower right hamstring.