David Moyes is being eyed by Celtic as the man to replace Ronny Deila in the summer.
The Norwegian’s one-year rolling contract will be up for renewal but Celtic are thought to be chasing the former Manchester United and Everton manager.
Celtic faced Moyes’ Real Sociedad side in a pre-season friendly and won 1-0 with the goal coming from Gary Mackay-Steven.
Moyes began his career in the green and white Hoops and made 28 appearances in three years before moving on to Cambridge United.
According to the Daily Mail, the 52-year-old tops the list of managers to replace Deila in the summer.
He spent 10 successful years managing 500 games at Everton and guided them to four European campaigns and a fourth-placed finish in the Premier League.
The Scot move to Manchester United in 2013 but was sacked in April as he failed to live up to high expectations in Manchester.
A spell aboard managing Spanish side Read Sociedad will also have given the manager valuable experience, even if his time there was one day shy of a year.
Moyes is thought to still have an affection for Celtic and although he would prefer a move to another Premier League team, a move up to Glasgow is a possibility.