Querrey upsets Kiefer in Las Vegas (AP) Sam Querrey advanced to his second ATP Tour quarterfinal of the season, beating eighth-seeded Nicolas Kiefer 6-3, 6-1 on Wednesday in windy conditions in the Tennis Channel Open. Querrey had six aces and converted 74 percent of his first serves. "I was pretty aggressive," Querrey said. "On the second serve, I was taking some chances. Publish Date: Wed, 05 Mar 2008 18:29:05 PST Read more...