Daniel Jacobs says he was SHOCKED the first time he took a punch from Gennady Golovkin this weekend -- telling TMZ Sports he thought the guy would hit harder!!
GGG's power is legendary -- he's knocked out more than 20 FIGHTERS before Jacobs.
But Daniel says the power ain't all it's cracked up to be -- "It was a myth. It was a facade. It was smoke and mirrors. It wasn't what I expected."
Jacobs lost the fight in a unanimous decision -- even though some people say Jacobs looked like the better fighter.
DJ wants a rematch. Stay tuned ...
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