Hewitt dropped the opening set Tuesday before bouncing back to beat Jan Hernych of the Czech Republic, 4-6, 6-2, 6-4. The second-seeded Hrbaty had an easier time, topping Rameez Junaid of Australia, 6-3, 7-5.

In other matches involving seeded players, number-five James Blake of the United States defeated Alberto Martin of Spain, 6-3, 6-3. But eighth-seeded Juan Ignacio Chela of Argentina was upset, losing to Ivo Karlovic of Croatia, 6-3, 3-6, 6-1.

Unseeded players advancing included Australia's Mark Philippoussis, Florian Mayer of Germany, Britain's Andy Murray, Andreas Seppi of Italy, Frenchman Florent Serra, Jarkko Nieminen of Finland and Danish player Kenneth Carlsen.