George Groves says he will silence James DeGale once and for all on Saturday.
The pair meet at the 02 Arena, London, in a clash for the British and Commonwealth super-middleweight titles.
The grudge match is set to be a 20,000 sell out, and will be shown live on Sky Sports.
DeGale has regularly trashed Groves during the build up to the fight.
But now his London rival has hit back.
"DeGale is a joke," said the 23-year-old, who already holds a win as an amateur over DeGale.
"He has always trash-talked everyone.
"He just can't handle the fact he got beat and he will get beat again, this time in front of more people.
"I am going to end the DeGale myth once and for all.
"It's nonsense and I am going to make him suffer."