Top seeds Andy Roddick and Vera Zvonareva opened with straight-set victories at an 860,000-dollar ATP and WTA tournament here on Tuesday. Roddick fired 11th aces, the last on match point, to defeat South Korea's Lee Hyung-Taik 6-3, 6-4. The 22-year-old American won 89 percent of his first-serve points and never allowed Lee a break-point chance. Roddick, who won his 16th career ATP title last week at San Jose, advanced to a second-round date against France's Arnaud Clement, who ousted Italy's Davide Sanguinetti 7-6 (7/1), 1-6, 6-1.

Defending champion Zvonareva of Russia made a successful start to her repeat bid with a 6-3, 6-1 victory over Czech Michaela Pastikova. Zvonareva, ranked 11th, reached a second-round match with France's 108th-rated Severine Beltrame.

American third seed Meghann Shaughnessy, with only one player ranked above 70th in the world remaining in her half of the draw, opened with a 6-3, 6-4 victory over compatriot Laura Granville. She next faces Sweden's Hana Sromova.

Two Asian women advanced in three sets. Korean Cho Yoon Jeong ousted Italy's Antonella Serra Zanetti (ITA) 6-4, 1-6, 6-2 and Japanese qualifier Yuka Yoshida defeated Czech qualifier Katerina Bohmova 6-2, 5-7, 6-4.

American Jan-Michael Gambill bounced Czech fourth seed Jiri Novak 6-0, 6-4 while third-seeded compatriot Vinca Spadea advanced with a 7-5, 6-2 triumph over Sweden's Thomas Enqvist.

Belgian fifth seed Xavier Malisse, who won his first ATP singles title earlier this month at Delray Beach, Florida, opened by beating Germany's Philipp Kohlschreiber 6-3, 6-3.

COLLATED RESULTS (x denotes seed):

MEN (FIRST ROUND): Jan-Michael Gambill (USA) bt Jiri Novak (CZE x4) 6-0, 6-4; Xavier Malisse (BEL x5) bt Philipp Kohlschreiber (GER) 6-3, 6-3; Irakli Labadze (GEO) bt Jonas Bjorkman (SWE) 6-4, 7-6 (7/1); Vincent Spadea (USA x3) bt Thomas Enqvist (SWE) 7-5, 6-2; Arnaud Clement (FRA) bt Davide Sanguinetti (ITA) 7-6 (7/1), 1-6, 6-1; Robby Ginepri (USA) bt Zach Dailey (USA) 6-2, 6-0; Andy Roddick (USA x1) bt Lee Hyung-Taik (KOR) 6-3, 6-4.

WOMEN (FIRST ROUND): Meghann Shaughnessy (USA x3) bt Laura Granville (USA) 6-3, 6-4; Michaella Krajicek (NED) bt Kelly McCain (USA) 6-4, 6-4; Vera Zvonareva (RUS x1) bt Michaela Pastikova (CZE) 6-3, 6-1; Yuka Yoshida (JPN) bt Katerina Bohmova (CZE) 6-2, 5-7, 6-4; Cho Yoon Jeong (KOR) bt Antonella Serra Zanetti (ITA) 6-4, 1-6, 6-2.

(SECOND ROUND): Jamea Jackson (USA) bt Sesil Karatantcheva (BUL) 6-3, 6-4.

Copyright Agence France-Presse, 2005