Top-seeded Janko Tipsarevic of Serbia cruised into the quarterfinals of the Mercedes Cup by beating Steve Darcis of Belgium 6-4, 6-2 on Wednesday.
Guillermo Garcia-Lopez of Spain upset fourth-seeded countryman Pablo Andujar 6-1, 4-6, 6-1 to make the quarterfinals of the clay-court event. 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.