After the surprising news that Neil Lennon had resigned from Celtic, the attention now turns to who will be his replacement.
It certainly won't be an easy job. Lennon has been responsible for three league titles in a row, two Scottish Cups and arguably his greatest achievement, a 2-1 win over Spanish giants Barcelona.
With that said, however, the Scottish champions won't be short of managers wanting the job. Although nothing is guaranteed, the new manager will be looking at the Scottish Premier League and undoubtedly will be licking his lips at the prospect of winning the League in his first season.
However, Celtic would ideally be wanting someone with Champions League experience. Although they are unlikely to win the tournament, they have had a number of memorable European nights and the fans will demand more of the same.
At present, Roy Keane is the favourite to take the job. The Republic of Ireland assistant manager hasn't been in charge of a side since he was sacked as Ipswich manager in 2011, but he comes with a huge amount of European experience as a player as well as a connection to the club thanks to a six-month stint towards the end of his career.
However, Keane is yet to fully establish himself as a manager in the top flight. His stint at Sunderland showed that he has the potential after gaining promotion in his first season in the Championship, but his lack of success in the Premier League may worry some Celtic fans who are desperate to keep the run of success that Lennon built. Keane is not the only option, however. Former Bolton Wanderers manager Owen Coyle sits just behind him in the bookies stakes.
Coyle has gained a reputation for building rugged and determined sides, perhaps without the flair that Lennon brought to Celtic. He does bring a huge amount of experience with him, though. The Scotsman spent the majority of his playing career in his homeland so he certainly understands the fans and the expectations that come with being Celtic manager.
His managerial career hasn't brought too many accolades, however. His biggest achievement so far has been securing promotion to the Premier League with Burnley in 2009 for the first time in 33 years.
Coyle's last managerial job didn't go to plan. After being announced as Wigan manager for the 2013 season, he lasted only until December, resigning with his side 14th place in the Championship.
Rounding off the top three is former Cardiff manager Malky Mackay. After his very public and incomprehensible sacking from the Blues, his reputation remains very much in tact. He took the Welsh side to their first ever League Cup final in his first season and secured promotion to the Premier League in his second, picking up the LMA Manager of the Season award along the way.
However, public criticism from eccentric owner Vincent Tan over his transfer market dealings and style of play, Tan gave Mackay the option of resigning or being sacked. He chose the latter.
He had been linked with the Norwich City job, but now that Neil Adams has been announced as full-time manager, the Scotsman will be looking at his options and the Celtic job would certainly have caught his eye.
Whoever replaces Lennon will have a difficult job. The Celtic fans will expect nothing less than the League title, particularly as arch-rivals Rangers continue to wallow in the lower leagues. The only risk in appointing any of the three is that none have any Champions League experience as a manager, however they all have proved that they deserve a chance.
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