Former Celtic striker Chris Sutton says his former club should already know the type of manager they want to appoint for next season before a summer revamp.
The Parkhead side have twice called on Martin O'Neill to take interim charge this season after Brendan Rodgers' resignation and Wilfried Nancy's sacking.
They have flattered to deceive for large periods of the campaign, but are still in the Scottish Premiership title race and have made it to the Scottish Cup semi-finals under O'Neill's astute management.
"If you're from a Celtic persuasion, you hope the groundwork has been done and they've already got a manager in mind for next season," Sutton told BBC Scotland.
"I have spoken about the Motherwell manager – Jens Berthel Askou – as a decent fit, but the one thing that goes against him is his profile.
"It's not just who Celtic get as the next manager, there's going to be a big overhaul of players in the summer.
"The squad has struggled this season – regardless of what happens in the league and in the Scottish Cup – and I think we're going to see a lot of changes."
