Liu Siyu

Liu Siyu (born 1 November 1995) is a Chinese tennis player.

Liu has a career high ATP singles ranking of 906 achieved on 11 October 2014. He also has a career high ATP doubles ranking of 1076 achieved on 9 August 2014.

Liu made his ATP main draw debut at the 2014 China Open in the doubles draw partnering Ning Yuqing.