Question: Vitali Boot is a German amateur boxer best known to win the bronze medal at super heavyweight at the 2001 World Amateur Boxing Championships, there he beat Poland's Grzegorz Kielsa (20:14), but lost to which eventual winner, an Uzbek former professional boxer who competed from 1997 to 2016?
Sentence (from "Ruslan Chagaev"): To date, Chagaev remains the only Asian boxer in the history of the sport to hold a heavyweight world title by any of the four major sanctioning bodies.
Relevant evidence: No