Deontay Wilder believes Tyson Fury is scared and will be having sleepless nights before their world heavyweight title rematch later this month.
The pair fight in Las Vegas on 22 February for Wilder's WBC championship.
Their bout in December 2018 ended in a controversial draw with the American knocking Fury down twice, although the Englishman also thought he had won.
"When you get knocked down by someone, you never forget it or how they did it," said 34-year-old Wilder.
Speaking on a media conference call from the United States on Tuesday, he added: "Deep down I feel he's nervous, very nervous from what happened the first time.