Ange Postecoglou is expected to complete a move to Tottenham after agreeing personal terms with the London club.
The Celtic manager is widely reported to have completed negotiations over a two-year deal at the club with an option of a further year.
Postecoglou, 57, was given permission from Celtic to discuss a move to Tottenham on Monday after a formal approach from the Premier League club.
And it's understood an announcement confirming his appointment will be released in the coming days.
However, a compensation package for Postecoglou to be paid by Spurs has reportedly yet to be finalised despite suggestions of a fee of around £5million.
Celtic could also face a fight to keep assistant John Kennedy, coach Gavin Strachan and video analyst Greg Wallace at Parkhead.
The trio are expected to be approached over deals to follow Postecoglou to Tottenham but it's claimed Dermot Desmond, Peter Lawwell and Michael Nicholson will try to keep the backroom members in Glasgow.
Postecoglou had been set to head on a family holiday on Tuesday after sealing a domestic treble with Scottish Cup success over Inverness at Hampden.
However, it appears quickfire talks mean he could take a break in the off-season after being announced as Tottenham boss.
After the final, Postecoglou had commented: “I anticipate enjoying this moment for the next 24-48 hours, as long as I can, before someone drags me away and takes my attention away from enjoying something that’s been hard-earned.
“The reality is, there’s probably players in that dressing room who won’t be here next year. That’s the nature of football.
“But I want them to enjoy it, I am going to enjoy it, and that’s all I am going to focus on until someone grabs me by the collar and tells me that I have to answer certain questions.”
With Postecoglou set for the exit, David Moyes and Brendan Rodgers emerged as bookies' frontrunners for the soon-to-be vacant Celtic post.
The current West Ham boss - set to lead the club into the Europa Conference League final on Wednesday - said of speculation linking him to Celtic last week: “I’ve never even considered it.
“I’m West Ham manager and I’m really enjoying my period here.
“I’m hopefully trying to continue growing a really good football club so I’ve not given it any consideration.
“Through my years I’ve been linked with lots of jobs at different times but I have to say I’m really happy at the moment and I’m settled where I am.
“The club have been so good to me and we’re enjoying the journey we’re on.”
And reports on Monday claimed Rodgers is not currently interested in a return to Celtic to succeed Postecoglou.
Comments from the former Parkhead boss speaking positively of a return to Celtic previously emerged online in the midst of developments in Postecoglou's exit.
However, it's thought Rodgers does not feel the timing is right for a move back to Celtic and will instead take time out from management after being sacked by Leicester.
