Celtic.Neil Lennon's sacking means one manager is set for the challenge of a lifetime and the immediate task at hand is catching up to a Rangers side still unbeaten in the league.But at the same time he'll be tasked with giving the squad a massive refresh.Rarely has a team that was blitzing all comers domestically ended up looking so jaded - out-of-date, even - in such a short space of time.There are a number of problem positions that have appeared from nowhere, stars that clearly aren't interested in the club's long-term future and a necessity to keep up with their rivals across the city.So here are some of the largest issues facing the new manager in terms of squad composition.As far back as September, Lennon went public with his.
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