Victor Ortiz -- I'm Gonna WIN 'Dancing With the Stars'

"Dancing With the Stars" contender Victor Ortiz is already a champion in the boxing ring -- and tells TMZ he already thinks he's got the moves to be a ballroom champ too.

Victor was taking a little breather from his hardcore "DWTS" training -- when we asked how the season 16 rehearsals were shaping up for a pro-athlete like himself.

That's when the gloves came off ... Victor said he's training harder than ever with partner Lindsay Arnold (a new 'pro' this season) to snatch the coveted mirror ball trophy, and boldly added ... "I'm definitely winning it!"