UFC Legend Chuck Liddell: Training My 4-Year-Old Daughter ... 'She's Tough!'

Be afraid. Be VERY afraid.

'Cause UFC legend Chuck Liddell says he's already training his 4-year-old daughter to be the next UFC superstar ... and she's about to start training with one of the greatest Jiu-Jitsu masters in MMA history.

Chuck was out with his daughter this weekend -- when he told us she's already shown great interest in the family sport -- "She LOVES it."

So, when we asked if he was going to let her start hitting the mats -- he told us she's already begun her karate training ... and is about to team up with Eddie Bravo, who famously trained Chuck.

Eddie is also credited with training another famous female fighter ... Ronda Rousey.

Get that contract ready, Dana.