Stuttgart:Defending champion David Ferrer eased into the second round of the Mercedes Cup by beating qualifier Lukas Lacko 6-2, 6-2 on Tuesday.
Fourth-seeded Ferrer is seeking his second straight title on clay, after winning the Bastad tournament last week.
Third-seeded Tomas Berdych also cruised into the second round with a 6-1, 6-1 win over Nicolas Lapentti. Berdych dropped just eight points on serve and saved the lone break point he faced.
Berdych is at a career-high No 10 in the ATP Rankings with a 31-14 record this year. He has won 10 of his past 11 matches.
Guillermo Canas, seeded fifth, won the first set against Stanislas Wawrinka but was forced to retire after the first game of the third set with a right hamstring injury. Wawrinka advanced 6-7 (5), 6-2, 1-0.
Seventh-seeded Juan Ignacio Chela defeated Max Mirnyi 6-3, 6-3 and No 8 Juan Monaco beat Jan Hernych 6-2, 6-1.
Philipp Kohlschreiber swept past Simon Greul 6-1, 6-2 and Stefan Koubek beat Jose Acasuso 6-2, 7-5 in other first-round matches.