Giant former two-time world heavyweight champion, Nikolai Valuev, once revealed the hardest punching opponent that he ever shared the ring with. It was in December of 2005 when Russia’s Valuev defeated John Ruiz via majority decision to capture the WBA world heavyweight title at the Max-Schmeling-Halle in Berlin. That night he became the tallest and heaviest world champion of all time, standing at 7ft and weighing 333lbs at his peak. He became a two-time world heavyweight champion in August of 2008, defeating America’s Ruiz once again to capture the vacant WBA title at the exact same location of his first world title triumph several years earlier. It was very hard to defend against.”Valuev defeated Holyfield via majority decision to make the first defence of his world title in his second reign.