WBC lightweight champion Adrien Broner has told Gavin Rees that he is in for "a long night" when the pair meet in Atlantic City next month.
The 23-year-old is making the first defence of the strap he won from Antonio DeMarco in November.
He admitted knowing very little about the Welshman, but believes that he will be too fast for him.
"I don't really know [Rees] but I want him to bring his A-game," Broner told BBC Sport. "I hope he's ready but it will be a long night for him.
"I don't need to get acquainted with anything he brings. I won't study his best moves or punch. My main focus is staying sharp and focused.
"Whatever he brings, it doesn't matter if he can't land a punch."
Rees's only defeat came when he lost his WBA World light-welterweight title to Andriy Kotelnyk in 2008.
