Russian former professional boxer Nikolai Valuev first won in 2005 the heavyweight champion title from this American former professional boxer of which ethnicity?
John Ruiz John Ruiz (born January 4, 1972) is an American former professional boxer who competed from 1992 to 2010. He held the WBA heavyweight twice between 2001 and 2005, and is the first Latino boxer to win a world heavyweight title.
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.