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
Nikolay Sazhin unknown title was sanctioned by World Chessboxing Association (WCBA). In addition, the official website of WCBA showed that Nikolay Sazhin was sanctioned as the current world champion at double weight divisions of Light heavyweight and Heavyweight. Nikolay Sazhin Nikolay Sergeevich Sazhin (September 15, 1988, Krasnoyarsk, Russia, then USSR) is a former world champion of chess boxing. Sazhin has an Elo rating of 1911. Sazhin's overall record was at that point 49–13–0. His alias is "The Siberian Express" or "The Chairman"(Председатель). Sazhin was 19 when he won the title from Frank Stoldt in July 2008. He defended his title, which wasn't