Yu Hiu Tung (Chinese: 余曉東; pinyin: yu xiao dong), (born February 5, 1984) is a professional tennis player from Hong Kong. The left-hander stands 1.72m and weighs 140 pounds. Yu is a member of the Hong Kong Davis Cup team, compiling a 8-12 record in Davis Cup action since 2002.
Yu started playing tennis at age six. He quickly emerged as one of Hong Kong's most highly touted junior players. Highlights of his junior career include ascending to a #70 junior world ranking.
Yu reached his career-high ATP ranking of #910 in the world on June 13, 2005. At the 2006 Asian Games, Yu won his first round singles match against Bhutan's Deepesh Chhetri, but lost in the second round to Taiwanese Wang Yeu-tzuoo. In doubles, he and Wong Wing Luen lost to former World No.1s and eventual gold medalists Mahesh Bhupathi and Leander Paes.
In 2007, Yu gave up his professional tennis career, and began study towards an associate's degree at HKU Space. He continues to play Davis Cup. On May 2, 2008, he was the No.29 person to carry the olympic torch in the torch relay leg in Hong Kong.