Fourth seed Tommy Haas raced through a tight first-round encounter at the SAP Open in San Jose.

Germany's Haas claimed a 6-4 7-6 (7/3) win over wild card Devin Britton in one hour 13 minutes.

Sixth seed Philipp Kohlschreiber of Germany prevailed in three sets over American Rajeev Ram, winning 6-7 (7/9) 6-1 6-3.

Sam Querrey, the seventh seed, saw off Russian Teimuraz Gabashvili 6-3 6-2 in just under 55 minutes.

Eighth seed Jeremy Chardy of France was beaten 6-3 6-1 by Bjorn Phau of Germany, Robby Ginepri lost 6-7 (5/7) 6-2 6-3 to qualifier Ricardas Berankis of Lithuania.

Benjamin Becker of Germany beat qualifier Tim Smyczek of America 6-4 6-2 and Michael Russell of America beat South Korea's Im Kyu-Tae 7-6 (7/6) 6-1.

Im was a late replacement for Mardy Fish, who withdrew with a left knee injury.