Wladimir Klitschko will defend his WBA, IBF and WBO heavyweight titles against Polish challenger Mariusz Wach on Nov. 10 in Hamburg.
Klitschko's management company announced the fight on Thursday, saying it will be the first time the Ukrainian has faced a bigger opponent. Wach is 6-foot-7 1/2, about 1 1/2 inches taller than Klitschko.
The 32-year-old Wach is No. 4 in the WBC's rankings, with 27 wins - 15 by knockout - and no defeats since turning professional in 2005.
Klitschko, the 1996 super heavyweight Olympic champion, has a 58-3 record including 51 knockouts.
The 36-year-old Klitschko returns to Hamburg for the first time since his unanimous decision victory over Britain's David Haye in July 2011 and for the fourth time overall.