Feigenbutz vs Sturm on April 24 in Germany
The 41-year-old Sturm returned to the ring last December after a nearly five-year hiatus. For the former world middleweight champion, it was also his first performance since serving a prison sentence for tax offenses.
Feigenbutz last fought in August, defeating Jama Saidi on points. The former super middleweight champion had his first fight since last year's defeat to Caleb Plant.