Hrbaty defeated South African Rik De Voest 6-1, 6-0, and Srichaphan defeated German Rainer Schuettler, 6-3, 6-3.
Eighth-seeded Hyung-Taik Lee of Korea won, 6-3, 6-4 over Russian Igor Kunitsyn.
In other first day matches, American Kevin Kim beat Dane Kristian Pless, 6-2, 6-4; Italian Stefano Galvani beat Taipei's Yen-Hsun Lu, 6-3, 7-6 (7-4); Thai Danai Udomchoke beat Swiss Marco Chiudinelli, 0-6, 6-2, 6-3; and Taipei's Yeu-Tzuoo Wang beat Chinese Xin Yuan Yu, 6-1, 6-4.
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