and mandated that top-contenders Valuev and John Ruiz meet for the vacated title. [3]   Ethnicity Chagaev's parents, Shamil and Zamira Chagaev, are from the Tatar village of Kalda, Barysh , Ulyanovsk Oblast , Russia, who moved to Uzbekistan in the 1950s.   Preceded by Nikolai Valuev WBA Heavyweight Champion April 14