David Tua (born 21 November 1972) is a Samoan and New Zealander former professional boxer. Known for his punching power, especially his left hook, he scored 16 knockout wins inside of the first round, and finished world heavyweight champions John Ruiz and Michael Moorer within thirty seconds, as well as late stoppages of Oleg Maskaev and Hasim Rahman. Tua's professional career spanned 21 years, during which he challenged for the WBC, IBF and IBO world heavyweight titles.