Nikolai Valuev 7 November 2009, billed as "'David vs. Goliath"', Valuev faced off against former unified and lineal cruiserweight champion David Haye (22-1, 21 KOs) at the Arena Nürnberger Versicherung in Nuremberg. Valuev lost on points (114–114, 116–112, 116–112). Valuev announced his retirement from boxing in a Russian newspaper three days after the loss to Haye on 10 November 2009. In 2010, Valuev's doctor went on record saying that he is treating Valuev for "serious bone and joint problems". Valuev underwent two operations that required at least six months on the sidelines. Valuev confirmed in 2013 that medical advice was one of
Nikolai Valuev and 114–114). Valuev changed trainers, from Manuel Gabrielian to Alexander Zimin, who coached the old Soviet Union amateur boxing team. On 29 September 2007, Valuev won against Jean-Francois Bergeron in Oldenburg, Germany, by a 12-round unanimous decision (118–111 on all three cards). On 16 February 2008, in a title eliminator, Valuev defeated former titleholder Siarhei Liakhovich, winning every round at the Nuremberg Arena in Germany. The victory earned Valuev the right to face Chagaev for the WBA title again, the only man who had defeated him in his boxing career. He was scheduled to face Chagaev for his WBA title