Joseph Parker's punching power is at its highest level ever ahead of his blockbuster bout against Anthony Joshua.
That's according to his sparring partner Malik Scott, who reckons the Kiwi's elbows being repaired has him ready to fire.
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The Parker camp revealed last week that the WBO champion underwent an operation in November to alleviate a restriction in his elbow movement which was causing pain.
The Aucklander has now overcome that issue and is set to put his title on the line against Joshua's IBO, WBA 'super' and IBF crowns on Sunday (NZ time).
Parker's co-promoter Bob Arum said from what Scott has told him the Joshua camp should be freaking out.
"The guy who he has been sparring with, Malik Scott, has been around the block, and he has sparred with Parker before and he said the difference is tremendous," Arum told Newshub.
"He told my people that Parker is throwing punches with more force than he has ever seen him. I think it going to make a big difference.
"Joshua has probably trained for Parker based off the films of Parker's previous fights and he is in for a surprise."
Due to that reason, Arum is dead set confident that his fighter will reign supreme.
"Parker is going to upset the apple cart. I like him to win. I think the Joseph Parker we're going to see is the best we've ever seen."
Arum, who has promoted legendary boxers, including Muhammad Ali, was asked if Parker or Joshua could have beaten Ali.
"I don't think either of them would have beaten Ali," he laughed.