Russian former professional boxer Nikolai Valuev first won in 2005 the heavyweight champion title from this American former professional boxer of which ethnicity?
Nikolai Valuev Nikolái Sergéyevich Valúev (Russian: Никола́й Серге́евич Валу́ев ; born 21 August 1973) is a Russian former professional boxer who competed from 1993 to 2009. He is a two-time WBA heavyweight champion, having first won the title from John Ruiz in 2005 and losing it to Ruslan Chagaev in 2007. The following year, Valuev regained the now-vacant title in a rematch against Ruiz, losing to David Haye in 2009 in his final fight.
Rakhim Chakhkiev Rakhim Ruslanovich Chakhkiev (Russian: Рахим Русланович Чахкиев ; born 11 January 1983) is a Russian former professional boxer who competed from 2009 to 2016. He held the IBO cruiserweight title in 2015, the European cruiserweight title in 2014, and has challenged once for the WBC cruiserweight title in 2013. As an amateur he won a silver medal at the 2007 World Championships and gold at the 2008 Olympics, both in the heavyweight division.