ROTTERDAM, Netherlands, Feb. 14 (UPI) -- Top seeds Roger Federer and Juan Martin del Potro advanced Thursday, gaining quarterfinal spots at the ABM AMRO World Tennis Tournament in the Netherlands.
Federer, the No. 1 seed and defending champion, dispatched Thiemo De Bakker 6-3, 6-4 in an efficient 62 minutes. Federer won nearly three-quarters of the points on serve, facing one break point. He had a break in each set in the win.