Dave Coldwell insists he would not be training Jamie McDonnell if he did not feel it was worth the effort.
The Rotherham-based trainer, manager and promoter welcomed McDonnell and twin brother Gavin into his gym earlier this year.
And he will be in the corner on Sunday when the Doncaster fighter defends his WBA bantamweight title in a rematch against Tomoki Kameda, who he initially out-pointed in May.
The fight has taken the McDonnell camp to Texas for the last fortnight with Coldwell missing out on a family holiday and not seeing his wife, son and daughter for more than three weeks.
And he says he would not make such sacrifices for just anyone.
“I had no intentions of training Jamie and Gavin,” Coldwell told the Star. “There’s a lot of headaches that go with them, in a nice way but a lot of headaches.
“I’m not in a position at the minute where I can deal with headaches. I’ve not got time for them.
“But I said I’d give it a go as long as we got a nutritionist in and did strength and conditioning.
“It’s working and I enjoy working with fighters that want to get better.
“I’m not into fighters who listen 70 per cent of the time.
“I want 100 per cent commitment.
“In truth I’m annoyed I’ve had to go to Texas for two weeks. I had to cancel my family holiday and my wife and kids went out to Ibiza without me so I won’t have seen them for three and a half weeks by the time I get back.
“I told Jamie if I wasn’t getting 100 per cent from him, I wouldn’t miss spending time with my wife and kids. Having my little girl crying because I’m not seeing her.
“I’m a proper homebird. I want to be chilling out with my son and daughter at the park, taking them to bed. And I’m not doing that.
“For me to go away to a different country and be away from them, it has to be worth it.
“I demand 100 per cent and Jamie and Gavin are giving me that.”
Coldwell took over the training of the McDonnell twins earlier this summer after they parted ways with Dave Hulley.
The 40-year-old assumed corner duties for Jamie - who he also manages - after Hulley’s crippling fear of flying prevented him from travelling to the US for McDonnell’s first bout with Kameda in May.
Coldwell says he found himself training the brothers on a permanent basis almost by accident.
He said: “I was happy with just working with Tony Bellew (top cruiserweight).
“But we came back from Texas and Gavin said ‘Our kid’s on holiday, can I come and train with you?’
“I said ‘no worries’ and we started. He’s obviously gone home and told Jamie about it and then one day Jamie just turns up.
“He never actually asked me if I’d train him, he just turned up at the gym and said I’ll start training.”
Coldwell expects to see an improved McDonnell when he locks horns with Kameda again this Sunday.
Working on power, stance and defence has formed a major part of his work with the 29-year-old this summer.
And he says McDonnell will continue to improve as he plots a British super fight with super bantamweight world champion Scott Quigg next year.
He said: “I showed him videos of him sparring and he’s seen the improvement.
“It’s been so good hearing him tell people that he’s seen the improvement because it shows that he’s listening and comprehending what we’re doing. If he doesn’t see it, no one else will.
“You will only get the trust of a fighter if they can see results. That is why Tony Bellew trusts me as his trainer. He can see the results.
“It’s very important there is that trust. You have to be able to explain why you want a fighter to do a certain thing.
“He’s got to win this fight, and win the next one and then there’s Scott Quigg.
“And you will see a different Jamie McDonnell for Scott Quigg.”
As for his man’s second tussle with Kameda, Coldwell expects the same outcome but believes the work that has been put into the camp will ensure a wider margin.
“It’ll be similar to the last one in that the fight is going to be hard fought, very technical with some missing going on.
“But I expect Jamie’s jab to be better, his inside work to be better, I expect him to be stronger and to be hitting harder.
“I want him to wins the round clearly and not let Kameda steal them. There were a lot of rounds in the first fight that Kameda stole in the last 15 to 20 seconds with these little flurries.
“He can’t afford to do that this time. Take that away and Jamie wins in more dominant fashion.”