Auckland, New Zealand , Jan 10 : American teenager Ryan Harrison beat his more experienced compatriot Sam Querrey 6-4, 6-3 Tuesday to advance to the second round of the Heineken Open.
Both players entered the tournament on wildcards and the 19-year-old Harrison proved more consistent than Querrey, whose ranking has dropped from 17 to 94 after a series of injuries.
Harrison was the aggressor from the outset, breaking Querrey's serve twice in the first set and in the sixth game of the second while Querrey made an unusually large number of unforced errors, particularly at the net.
Earlier, French qualifer Adrian Mannarino ousted fifth-seeded South African Kevin Anderson 6-3, 6-3 while eighth-seeded German Philipp Kohlschreiber struggled past Swiss qualifer Stephan Bohli 6-4, 4-6, 6-4.
