Gia Giudice might be shaking in her boots before her dad Joe's celebrity boxing match on Saturday ... but the "Next Gen NYC" star tells TMZ Sports that doesn't mean she isn't confident he'll kick some ass and win by knockout!!
Joe -- former cast member of "The Real Housewives of New Jersey" -- is facing actor Antonio Sabato Jr. in Tijuana for the "Battle of the Italian Stallions" PPV event in a few hours.
