Carl Froch believes Kell Brook just needs to overcome doubts over his fitness in order to prove he has what it takes to become a world champion.
The Sheffield fighter meets Hector Saldivia in a final eliminator for the IBF welterweight title live on Sky Sports on Saturday night looking to improve on his performance in his previous bout with Carson Jones.
Brook impressed early on in that fight, but suffered from a lack of conditioning as his opponent took control in the later stages.
Speaking about his Matchroom stablemate on Ringside, Froch said he has been addressing his fitness issues - and backed him to impress in front of his hometown fans this weekend.
"We're talking about him being a world champion and competing at the top level and he's on the fringe of world titles," he said.
"Obviously in his last fight he struggled towards the end and, for me, that was purely a fitness issue. He's addressing that now.
"Dominic Ingle has been talking about his nutrition, his diet and the physical side of it and that's what he needed to put right - and he's putting that right.
"He's got a great, experienced team around him at the Wincobank gym that have been there, seen it and done it with top fighters.
"He's there and I'm sure that on Saturday night he'll prove to everybody that he's got what it takes."
One of the fights on the Sheffield undercard features a former opponent of Froch, as 41-year-old former world champion Robin Reid faces gritty Scotsman Kenny Anderson.
Despite his age, Reid insists he has the power in his fists to beat any opponent but while Froch agrees he is a tough fighter he can't see him claiming the vacant British super-middleweight title on Saturday.
"He still loves the game," he said.
"He enjoys it and he's still fighting. He's obviously got his reasons, but he keeps himself in fantastic physical shape and he has been speaking about punching power.
"I think punching power is the last thing to go in a fighter's artillery. The fitness is there late on, the reflexes go quick, but the punching power is always there.
"He can punch and I can vouch for that! He caught me in round four with an over-hand right and when I thought I was walking back to my corner I actually wasn't, I was walking into the ropes in the other direction because he'd caught me that hard. It was a solid shot.
"He can punch hard, but Kenny Anderson is very tough. I think Kenny Anderson will tough out any shots that do land on him and walk through them.
"Robin Reid has been there, seen it and done it but it's towards the end of his career and he's seen better days.
"But it's an intriguing match-up for both of them - and for the fans."