Glenn Rushton has rejected the notion that Jeff Horn gets by on sheer willpower, saying the Australian champion's record is far more impressive than Terence Crawford's.
Rushton dropped some compelling statistics when asked at the official pre-fight press conference how Horn's rugged determination would be able to account for Crawford's incredible technical ability in their world title fight on Saturday.
He tallied up the wins and losses of all of Horn's opponents across his first 19 fights as a professional and did the same for Crawford.
Crawford's rivals had 175 wins and 178 losses - compared to Horn's, who had a whopping 411 wins and just 101 losses.
Rushton also pointed out that 12 of Horn's adversaries were ranked inside the world's top 15, and that his quarter-final performance at the 2012 Olympics in London was the best effort by an Australian boxer in more than two decades.
Crawford, who has won all 32 of his professional fights and all bar nine by knockout, did not even qualify for the US Olympic team.
"(Horn) doesn't just have to rely on will. He's a very, very competent, skilful boxer," Rushton said.
"Yes, his style may not be the silky-smooth style we see from the very classy Terence Crawford, but Rocky Marciano wasn't that silky and smooth either, and look at his record.
"He was very effective, he had a great chin and he could hit like a mule. So can Jeff Horn.
"If it comes down to a battle of spirits, and I think at some stage in this fight we all get tested, I back Jeff's spirit.
"He has a terrific spirit and he's incredibly competitive. But it goes a lot deeper than just will."
Horn said he always expected to be considered the underdog against Crawford but not to the extent he is being viewed as in Las Vegas.
The MGM Grand sports book is offering 8-1 odds for a Horn victory by knockout and 10-1 if he wins a decision.