UFC superstar Yoel Romero has a big rematch with Robert Whittaker this weekend ... but there's a MUCH bigger opponent he's already got his sights on -- SHAQ!!
TMZ Sports started asking The Cuban Missile about meeting The Big Aristotle at an event in Miami back in May ... and that's when Y.R. revealed he wants to get in the Octagon with the 7'1" giant to give him the whoopin' of a lifetime.
FYI, Yoel is 6'0" and 185 lbs.
Yoel might be teasing about the fight .