Ben Davison, the former head trainer of Tyson Fury, explained that his ex-student had a habit that WBC heavyweight champion Deontay Wilder exploited in the first contest.
Fury went down in the ninth and twelfth round. The contest, which took place in December 2018, ended in a controversial twelve round split draw at Staples Center in Los Angeles.
The rematch takes place on February 22, at the MGM Grand in Las Vegas.
Last month, Fury shocked observers when he made a decision to drop Davison as his head trainer.
Davison ran Fury's corner from the start of the boxer's comeback in late 2017 He trained him for his last five fights.
For the rematch with Wilder, Fury will now have SugarHill Steward as his new head trainer.
"Fighters have habits and tendencies and that's what you look for as a trainer. If you do something too often and for too long at the top level you'll be made to pay for it. What Wilder does is he bounces on the spot, not back and forward, but on the spot and it's a mental reset," Davison told BT Sport.
"For Tyson, it's when he touches his face and wipes his nose and I know Wilder worked on that and went to throw. Something happened at the end of the eighth round; when Tyson got hit with a right hand on the top of his head, he wiped his nose, touched his face, a bit of a reset.
"Then in the twelfth there was space behind Tyson to step into to take the distance away but he didn't do it, and I believe it was a single lapse in concentration because of the habit. It's something to be aware of; when he's training and he does it, add a step on it or add a reset where he moves, changes position and it takes it away.
"There were rounds that went by where Wilder couldn't land then he found one. I think Tyson now knows he has to respect that right hand for twelve rounds and if he can add that into his next performance I believe he wins."
