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 on 5 July 2008, but Chagaev pulled out with an injury. Valuev instead fought John Ruiz for the vacant title on 30 August 2008 and the WBA decided to make Chagaev "Champion In Recess". Valuev defeated Ruiz by unanimous decision to regain the WBA heavyweight championship, with Valuev and Chagaev set to fight no later than 26 June 2009 to determine whom the WBA regarded as their champion. Their scheduled rematch on 30 May 2009 was cancelled due to Chagaev's viral infection and on 24 July 2009, when the WBA published their Official Ratings as of June 2009, Chagaev was