Siarhei Piatrovich Liakhovich (Belarusian: Сяргей Пятровіч Ляховіч, romanized: Siarhiej Piatrovič Lachovič; Russian: Серге́й Петро́вич Ляхо́вич, romanized: Sergey Petrovich Lyakhovich; also Siarhiej Piatrovič Liachovič or Siarhiej Piatrovič Lyakhóvich; born 29 May 1976) is a Belarusian professional boxer who held the WBO heavyweight title in 2006.

As an amateur, he won a bronze medal in the super-heavyweight division at the 1997 World Championships.

[2] He lost the title to former Lineal heavyweight champion Shannon Briggs by technical knockout in the 12th round on November 4, 2006, after being knocked down twice.

[3] On February 16, 2008, Liakhovich lost to Nikolai Valuev by unanimous decision following a one-sided contest.

[5] In February 2014, Liakhovich achieved his first win in four years with a unanimous decision over journeyman Chad Davis.