8/5/2016 3:12 PM PDT BY TMZ STAFF
McGregor was answering questions on the UFC 202 media conference call Friday — when he admitted that he underestimated Nate’s chin and toughness the first time around … but he won’t make that mistake again.
“He weathered the storm,” Conor said … “I’m just gonna be a lot more prepared for a man that can stay in there with me.”
That being said … Conor said confidently — “I will K.O. him inside the 2nd round.”
Funny moment though … Conor says Nate was a “heavy bag with eyeballs” during the first round and a half of their first fight.