Chris Eubank Jr. is hoping to make Wanik Awdijan pay for his actions on social media in the build-up to the fight.
The pair fight on Saturday night in Newcastle on a card which features Hughie Fury and Savannah Marshall.
Speaking about his Germany-based opponent, he said: "He started the press conference by trying to be the nice guy and complimenting me - 'I'm a great boxer' and all this stuff.
"But you can't go from saying the things that you said on social media to then trying to be Mr. Nice Guy.
"I'm not going to let that fly.
"He fancies himself, he thinks he will cause an upset. It's my job to stop that at all costs."
The 32-year-old Briton hopes to end the year with a title fight, but is not looking past Awdijan.
"If you don't have the confidence to go out and perform, you will get hurt,” he warned.
"The guy is 28-1 so he knows what he's doing.
"I'm not underestimating him at all.
"But I know what I am. I know what I can do. I know what I'll do to him on Saturday night."