Guillermo Garcia-Lopez of Spain upset fourth-seeded countryman Pablo Andujar 6-1, 4-6, 6-1 Wednesday to reach the quarterfinals of the Mercedes Cup.

Garcia-Lopez will play German wild card Dustin Brown, who hit 19 aces in beating Benoit Paire of France 7-6 (4), 4-6, 6-1.

Another German reached the last eight when Bjorn Phau defeated Lukas Rosol of the Czech Republic 7-6 (3), 7-6 (2). Rosol stunned Rafael Nadal in the second round of Wimbledon before losing his next match at the grass-court Grand Slam.