Bernard Hopkins will make the first defence of his IBF light-heavyweight title against Karo Murat in Brooklyn on July 13.
Hopkins broke his own record as the sport's oldest world champion in March when he claimed the belt with a points win over Tavoris Cloud at the age of 48.
The American has expressed an interest in facing British duo Carl Froch and Nathan Cleverly, but he will firstly take on mandatory challenger Murat at the Barclays Center.
"Murat has nothing to lose and everything to gain by fighting me," said Hopkins.
"He knows he is fighting a 48-year-old, but he has to understand that there aren't any other 48-year-olds like me."
Murat's solitary defeat was a stoppage by Cleverly, but the German remains confident he can burst onto the world scene with an upset win over Hopkins.
"His biggest strength is his experience, but I will reveal his weaknesses at Barclays Center in front of his own fans," he said.
"I will be in the best shape of my life and will snatch his belt from under his nose."