Mike Tyson -- Drake Can Date My Daughter, But There's a Painful Catch ...

Mike Tyson thinks Drake's a good-looking dude who would definitely get the green light to date his daughter when she's old enough ... but not without a ridiculously scary threat first.

Iron Mike was talking with DJ Whoo Kid on his Whoolywood Shuffle show when he revealed that his 6-year-old daughter is a major tennis prodigy who could be the next Serena Williams.

In fact, Mike says she's already won 2 city championships and even scored a point on Andy Roddick during a match at a charity event.

But being the next Serena comes with dating Drake -- and Mike says he'd be okay with that, 'cause Drake's handsome ... but you gotta hear the warning he says he would give him.