New Wigan Athletic signing Gary Caldwell says it was the right time to leave Celtic.

The 27-year-old felt under-valued by the Hoops and made the decision to leave Parkhead some time ago, although he claims he would have remained at the club had he been given any encouragement to do so by manager Tony Mowbray.

"A contract was in the offing and, as happens many times, one party wants one thing and one wants the other and you can't come to an agreement," said Caldwell, who on Wednesday signed a four-and-a-half-year deal with Wigan, of his parting with Celtic.

"I think I had opinions of what I was worth to the club and they had different opinions.

"That happens in football. I don't think they will have any regrets and hopefully I won't either.

"In the end it was time for me to move on. It (his decision to leave) was a while ago but for a long time the writing has been on the wall.

"I have nothing against the club, I thank everyone at the club for all they have done for me over the years.

"I did my very best for them right up until the last day I was there and I think that is all you can ask.

"I would have stayed until the end of the season as I was more than willing to help the club try to win the league again but Gordon and (Wigan boss) Roberto (Martinez) came in and they allowed me to speak to them."