Former World No. 3 David Nalbandian of Argentina earned an easy straight sets victory over the German Philipp Petzschner to reach the quarter-finals of the 2011 Heineken Open, an ATP World Tour 250 Event, being played here in Auckland, New Zealand.
Nalbandian finished off the match with a 6-3 6-2 scoreline.
It took less than an hour for the Argentine to subdue the German. Nalbandian earned the break in the second-game of the first set and maintained that lead till the end to wrap it up with a 6-3 score, tennisearth.com reported.
