Former Celtic boss Neil Lennon admits he has considered that he may have made a mistake when he walked away from the Parkhead hot seat during his first spell as boss.
Lennon spent four seasons as manager at Celtic Park from March 2010 to May 2014 and lifted three Scottish Premiership titles during his first tenure, and famously led the Hoops to the last 16 of the Champions League during that time after claiming a group stage victory over Barcelona.
However, after securing his third consecutive title the Northern Irishman would draw a line under his time in Glasgow's east end to try his luck elsewhere.
He would endure ill-fated spell at Bolton before leading Hibs back to the Scottish top flight, and after leaving Easter Road Lennon would eventually be back in the Parkhead hot seat when Brendan Rodgers left the club for Leicester City.