WBC heavyweight champion Vitali Klitschko will take on Germany's Manuel Charr in Kiev on September 1 in what is expected to be his final professional bout.
Klitschko, 40, will fight in his homeland for just the second time, with the first over a decade ago in 1998.
Syrian-born Charr, 27, is unbeaten with a 21-0 professional record, while Klitschko holds a 44-2 win-loss streak.
A crowd of 70,000 will bid farewell to Klitschko, who is expected to move into politics following his retirement, at the national football stadium.
