 Three weeks after the Michalczewski bout, it was reported that Rocchigiani had tested positive for traces of ephedrine and methylephedrine.However, the German boxing association did not request a follow up test.In March 1998, Rocchigiani captured the vacant WBC light-heavyweight title by defeating Michael Nunn by split decision at Max Schmeling Halle, Prenzlauer Berg, Berlin, but was demoted to "interim champion" three months later after the WBC inexplicably claimed its references in promotions and contracts to the Rocchigiani-Nunn fight as a championship bout, and to Rocchigiani as the champion in its rankings, had been "typographical errors".