By Adrian Warren
Australian Sam Soliman believes the original result of his first fight with Felix Sturm still lingers in the IBF middleweight boxing champion's mind.
Soliman is confident the German harbours some doubts ahead of their rematch next month.
The 40-year-old outpointed Sturm in a non-title fight in Dusseldorf in February 2013, but the local German boxing commission the BDB (Bund Deutscher Berufsboxer), declared the bout a no-contest after announcing Soliman had tested positive for an illegal stimulant.
Soliman's B sample tested clean and while boxing records still record the result as a no contest, Soliman believes Germany's IBF middleweight champion Sturm would regard it as a defeat.
"He's going to have in the back of his mind I've beaten him," Soliman told AAP from Copenhagen, where he is preparing for the June 1 fight in Krefeld, Germany.
"He doesn't know if he can beat me."
While there was drug testing before and after their first fight, it will only be conducted post-fight this time, at the request of Sturm's management.
The Victorian won't be making any major modifications despite the fact Sturm had 12 rounds of experiencing the Victorian's unconventional style.
"I believe if something's working don't fix it, but make it better than what you've got," Soliman said.
"Tweak it any way you can, and in every way you can but don't totally change something."
Soliman has however made a couple of changes to his pre-fight preparations.
He has prepared in Denmark instead of England and thanks to backing from new sponsors Fusion Workforce and Total Logistic Solutions, has been able to take 12 weeks off work and train fulltime.
Soliman spent two weeks training in southern Denmark before moving to Copenhagen. He heads to Germany on the weekend.
Among his sparring partners is Denmark's former super middleweight world title contender, Rudy Markussen.
"I wanted the best sparring I could get, that's what I was looking for, but fortunately two of them are like mirrors of him (Sturm)," Soliman said.
"That wasn't what I was looking for, that's come by coincidence."