Crawford isn’t unhittable though. He’s a better boxer than Spence, but Spence will put some leather on him at some point in the fight. I see it going down similar to the way GGG/Brook went. Crawford outboxes Spence early on, but eventually gets broken down.
Spence doesn't hit as hard as everyone thinks, but it's an accumulation of punches that hurts you, but he's no Tommy Hearn"s power wise, Spence is more of a Terry Norris type of power puncher and not your Julian Jackson power puncher, so Crawford and his defense should be fine, also Spence relies on brute strength to ware you down, with constant effective body shots, just watch him vs Brooks and the body work he's doing to him.
Sometimes Crawford gets caught with power punches against the smaller weight class fighters, because of his pressure and not thinking they could actually knock him out and remember young Floyd did the same thing, just watch him against chop chop Corley and he's actually getting rocked against Corley, but at the higher weight classes Floyd used his quick footwork and defensive styles against fighters his size and strength, Crawford probably will do the same against fighters at 147.
Crawford most likely will get dropped against Spence or rocked real bad, but i doubt he's getting stopped, but style wise and boxing ring IQ, there's nobody at 147 or 154, that's outboxing him for 12 rounds, he's just to gifted to lose to them.
The right game plan to beat Crawford if i was Spence is to use his legs like Sugar Ray Lenard and Ali and make Crawford chase him and walk him down, then counter punch Crawford setting traps using his jabs and keeping distance, then using constant movement with quick footwork, fight Crawford like Roy Jones fought James Toney, using quick footwork and counter punches with different boxing angels.
Although Crawford isn't unbeatable, nobody is, except maybe a prime Roy Jones and Floyd, Whitaker.
Crawford isn't as gifted as those legends, but these fighters at 147 don't have the skills to beat him, except Spence, but he's relying to much on his brute strength and punching power to stop and beat everyone and this is going to be a problem against a very smart southpaw/counter puncher with great power, that already cleaned out 2 other weight classes and is proven to be number one pound for pound the best boxer in the world.
Remember Spence was trying to weaken Brooks and actually was losing on the score cards by a point or to against Brooks, then the other eye socket damage happened and the knockdown then Spence went up by 2 points winning the last couple of rounds and then Brooks got nervous and quit, what if that eye didn't fet damaged, could Brooks outpoint Spence? probably yes and i would bet he would've won that fight.
Spence uses his legs and reach and strength when fighting on the outside, but makes Crawford chase him and he's counter punching Crawford keeping him at a distance he's winning this fight, but he's going to have to be extremely aggressive on the inside a bully Crawford, but on the outside make Crawford chase him.
Crawford needs to make Spence constantly chase him and counter punch him using quickness and footwork, like Whitaker and clinch when Spence tries to fight aggressive on the inside and bully Spence by throwing him around and using body shots on the inside, for him to win.
The problem is Spence won't fight that way and will lose trying to stop Crawford and get outboxed for 8 of the 12 rounds .
Rematch might be different, but it depends on how smart ring IQ wise, Spence team is.
Remember Sugar Ray Lenard and Dundee, made a extremely stupid mistake boxing wise, against Roberto Duran and it cost them a easy winnable fight, then the rematch was totally different and extremely easy.
Dundee trusted teaching Lenard how to be an inside counter puncher, but Duran was way better at it and outfought Lenard and hurt him.
But Duran couldn't cut off the ring and use his constant pressure like Chavez could and he got so frustrated he stopped fighting literally.
Crawford wins the first fight because Spence fights like Julian Jackson and gets outboxed easily, but has spurts of success in the late rounds.