 The reported first undisputed champion was Georg Hackenschmidt, who won a series of tournaments in Europe, including a world championship tournament to win the title.Amongst the other tournaments he won were the annual major tournaments in Paris, France; Hamburg, Germany; St. Petersburg, Russia; and Berlin, Germany.Hackenschmidt also defeated European Greco-Roman Champion Tom Cannon on September 4, 1902 in Liverpool, England to become the first undisputed World Heavyweight Champion.