The WBA (Super), IBF, WBO, IBO and The Ring title-holder will put his belts up against the record of Polish 32-year-old Wach, who at 6’7” and 250lb stands an inch taller and weighs slightly more than ‘Dr. Steelhammer’, in Hamburg.
The fight, Klitschko’s first since retaining his titles for the second time against Tony Thompson in Berne last month, will take place at the O2 World Arena, home of hockey’s Hamburg Freezers and the HSV handball franchise.
WBC international champion Wach’s record heading into the title opportunity stands at 27-0 with 15 knockouts and includes three previous victories on German soil as well as a seventh-round stoppage of 7’1” Julius Long in 2009.
"My fellow countrymen Adamek and Sosnowski did not have what it takes to beat a Klitschko," Wach said.
"I am not a former cruiserweight (like Adamek) but a real heavyweight. Klitschko will take a lot of hard punches before I knock him out. I will be the first Polish world heavyweight champion."
The bout will mark Klitschko's first return to Hamburg since defeating England's David Haye in July 2011.
"To fight in Hamburg once again is very special to me," he said.
"Here I started my professional career and last year Vitali's and my dream to unify all heavyweight titles in the Klitschko family became true."
- Hamburg Freezers