Laura Robson beat second seed Roberta Vinci in straight sets to reach the quarter-finals of the Italiacom Open.
England's Robson, 18, won the first set 6-3 but was a break down at 5-3 in the second set in Palermo, Sicily.
However, the world number 113 twice broke Vinci, ranked 27th, and then served out to take the set 7-5.
In the last eight she faces fifth seed Carla Suarez Navarro, who beat Anna Tatishvili 6-1 3-2 after the Georgian retired because of injury.