New Wigan boss Chris Hutchings said he tried to persuade Paul Jewell not to quit the club.
Hutchings was quickly named as Jewell's successor at Wigan
Hutchings was promoted from assistant manager on Monday after Jewell announced he was stepping down.
He said: "Paul said he needed a break. That came as a shock because we have worked very closely for 10 years now.
"I tried to talk him out of it but he gave me his reasons and was adamant. But we can't keep going on about Paul - this is a new era for the club."
Jewell stepped down just a day after masterminding Wigan's Premiership survival and chairman Dave Whelan acted quickly to promote Hutchings.
Chris Coleman would have applied, I've no doubt, but I don't know him
Wigan chairman Dave Whelan
Hutchings' only previous managerial experience came in very similar circumstances when he replaced Jewell at Bradford after the Bantams escaped the drop on the last day of the 1999/2000 season.
But the 50-year-old lasted only 12 Premiership games before he was sacked in November 2000.
However, Whelan has defended his decision to appoint Hutchings, who has signed a one-year contract and will have a reported £20m to spend on players in the summer.
"People will say he has no name - but I know Chris Hutchings," he said.
"I can't spend a few weeks looking around. Next season starts now. I know Chris was not a success at Bradford but it has not stopped me respecting him.
"I'd have had 20 applications if I'd put it on the market but I wouldn't know what they're like.
"Chris Coleman would have applied, I've no doubt, and he did a good job at Fulham and I was surprised when they sacked him but I don't know him.
"Chris Hutchings has learned a hell of a lot from Paul Jewell over the last six years. I'm right behind him and I'll give him my full backing."
Hutchings said he was looking forward to improving his managerial record.
"I wouldn't be going into this job if I didn't relish the challenge. It is nothing new to me and it is certainly something I am looking forward to," he said.
I don't want us to be scrapping for survival every year, we have the potential to be far better than that
New Wigan boss Chris Hutchings
"It will be much the same approach although I think I am a little bit calmer than Paul. Now I have got to get straight down to the business of preparing for next season."
And he told Wigan's official website: "I want us to move to the next level.
"I don't want us to be scrapping for survival every year, we have the potential to be far better than that.
"I'm inheriting a club in fantastic shape, that despite a difficult season, is still really strong in the dressing room, with a winning mentality and an unbelievable team spirit.
"The chairman has given me the backing to go and strengthen the playing squad, and to bring in an assistant, and there's no doubt in my mind that we have the potential to go and achieve great things."