Heavyweight world champion Oleksandr Usyk will defend his WBO, WBA (Super) and IBF titles against Briton Daniel Dubois in Wroclaw, Poland on 26 August.
Ukrainian Usyk, 36, will face Dubois - the WBA mandatory challenger - at the 24,000-capacity Tarczynski Arena.
Dubois, 25, holds the WBA (Regular) belt and has won 19 fights, with 18 knockouts, and been defeated once.
"He is a great fighter and I do respect him, but it's my time now," Dubois said.
"I'm going to shock the world and show people how good Daniel Dubois really is."
Pound-for-pound star Usyk has won all 20 professional fights and will make a second defence of his unified title.
"I am very glad that we have the opportunity to organise my fight in Poland, where I won my first world title seven years ago," Usyk said.
The fight, originally scheduled for 12 August, was pushed back by two weeks to more closely align with Ukraine's Independence Day, which falls on 24 August.
