Wild card Julian Reister of Germany upset fifth-seeded Fernando Verdasco of Spain 6-2, 6-3 in the first round of the German Tennis Championships Tuesday.
Lukas Rosol of the Czech Republic also pulled off another surprise, beating eighth-seeded Viktor Troicki of Serbia 5-7, 6-3, 6-4. The 107th-ranked Rosol stunned Rafael Nadal in the second round of Wimbledon last month.
Other seeded players in action advanced. Top-seeded Nicolas Almagro of Spain cruised past Tobias Kamke of Germany 6-4, 6-1 and No. 3 Juan Monaco of Argentina beat Cedrik-Marcel Srtebe of Germany 6-4, 3-6, 7-5.