KUALA LUMPUR :  Taiwan's Hsieh Su-wei clinched her career first WTA singles title at the Malaysian Open Sunday, while her compatriots Chuang Chia-jung and Chang Kai-chen won the doubles title. World No 123 Hsieh beat Croatia's Petra Martic, who had fought for over three hours against Jelena Jankovic earlier the same day. Hsieh was leading 2-6, 7-5, 4-1 when, Martic, the fifth seed, withdrew because of an injury.