2003 was a relatively poor year for Liu as a singles player until December, when she reached the quarterfinal of a $50k tournament at Shenzhen with a clean run of five straight sets wins in qualifying and the main draw, only to cede victory to Zheng Jie by default.
In 2003, Liu's singles performance was poor until December, when she achieved a strong run in Shenzhen, winning five straight sets in both qualifying and the main draw to reach the quarterfinals. However, she lost her match against Zheng Jie by default.