Hunt's corner told him he needed a big third round in order to have a chance but the constant grappling sapped his strength and he soon found himself underneath Blaydes.
Hunt show heart to get up several times but it was fruitless. Ranked the fifth best heavyweight in the UFC, his big chance of winning the fight was in that first round but he just couldn't finish the ninth-ranked Blaydes off.
"He came on like I knew he would," Blaydes said afterwards. "He tried to knock me out and hurt me early. I learned my lesson and went back to my takedowns – ground and pound."
Blaydes, who chalked up a personal best 10 takedowns during the fight, said he was hurt for about 20 seconds by Hunt in round one, "but I recovered in that next takedown".
To boos, he added: "I know Australians are going to root for their hero. No offence but I came to win and I did what I wanted to do."
Hunt now has a 13-12-1 UFC record and his chance at a title shot, already tenuous due to his court action against the UFC for allegedly allowing his opponents to use performance enhancing drugs, looks extremely doubtful now.
Two judges gave Blaydes all three rounds with one giving Hunt the first round.
In an undercard fight, the New Zealand-based middleweight Israel Adesanya, the self-styled "Style bender", looked extremely impressive on his UFC debut in stopping Rob Wilkinson in round two.
An assured Adesanya afterwards said he was putting the entire division on notice.
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