"It's a great thing," Blake said of the Americans' success. "Maybe, eventually, we'll get a Sports Illustrated or somebody to write that American tennis is not dying and that we're alive and well. We're Davis Cup champions and now we're having a good week here and, hopefully, we'll have someone raising the cup at the end of the week, too."
The last time six Americans reached the quarterfinals at an ATP event was at Memphis in 2003. Taylor Dent defeated fellow American Andy Roddick in the final. This tournament last had six Americans in the quarterfinals in 1993.
The 62nd-ranked Querrey, who beat Guillermo Garcia-Lopez of Spain 6-4, 5-7, 6-4, likes the fact that this tournament has become heavily dominated by his countryman.
"It's nice and it's definitely good for American tennis," said Querrey, who will play Spadea on Friday. "You don't really want to play another American because everyone likes everyone. But you just have to deal with it."
Spadea, a 33-year-old journeyman, reached the quarterfinals with a 7-5, 4-6, 6-3 win over Gilles Muller of Luxembourg.
"It's great for American tennis," the 74th-ranked Spadea said. "It shows we like to play well in America and play well on our surface, hard courts. It's exciting for me to be in that pack."
Fish won an uphill match against Ivan Navarro of Spain 2-6, 7-5, 6-3.
After losing the first set, Fish broke serve in the final game of the second set when Navarro double-faulted on set point.
Fish will play Ginepri, his good friend, in the quarterfinals. Ginepri, a one-time top-20 player, is struggling to move up from his current world ranking of 170. Playing in his first ATP main draw this season, Ginepri reached the quarterfinals with a 7-5, 4-6, 6-2 win over fellow American Michael Russell.