Martin O'Neill reveals the Celtic signing he REGRETTED - 'we famously never got on'

Martin O'Neill has revealed the only Celtic signing he ever regretted - and the player never cost him a penny.

O'Neill revolutionised the Hoops when he arrived in 2000, leading the club back to the top of Scottish football after almost a decade of turmoil on and off the park. Inheriting the mess left behind by John Barnes, the Northern Irishman transformed the Parkhead giants with the signings of Chris Sutton, Alan Thompson, Didier Agathe, Neil Lennon and more - dethroning a star-studded Rangers side to lift a famous Treble in his debut season.

O'Neill went on to win seven trophies in Glasgow, and oversaw the memorable run to Seville where Celts suffered a heartbreaking UEFA Cup Final defeat to Jose Mourinho's Porto in 2003. Regarded as one of the club's greatest-ever managers, the ex-Leicester City boss got more signings right than wrong during his five iconic years in charge. But looking back, the 72-year-old admits there's one capture in particular that simply didn't work out.

As Celtic searched for a successor to Henrik Larsson's iconic number seven jersey, O'Neill plumped for a marquee replacement for Brazil World Cup winner Juninho. The little genius was a superstar at Middlesbrough and Atletico Madrid and joined the Hoops on a free transfer in 2004. But after just a handful of starts, the classy playmaker decided to cut ties with the club after just six months, moving back to his homeland with Palmeiras. Despite a promising debut against Rangers, it became clear that Juninho's best days were behind him and the midfielder struggled to get to grips with Scottish football.

O'Neill takes his share of the blame for that and admits the pair didn't quite see eye-to-eye. In an interview with Graham Spiers on the Press Box