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Former Celtic midfielder Simon Donnelly believes Leigh Griffiths is a key man in the club’s quest for the treble-treble.
The striker has been missing through injury since early October but is hoping to return in the near future.
Speaking to the Daily Record, Donnelly says the festive period will be an important part of the whole season, with Griffith’s involvement pivotal:

You have to remember Celtic have been missing Brown, Ntcham and Griffiths in recent weeks.
They have been operating with one fully-fit striker in Edouard and Rodgers will be wanting Griffiths to return to the first-team fold as quickly as possible.
Edouard is on a real hot run of form. Griffiths is the top striker at the club when he is on song but he needs to get his fitness levels back up to speed.
Celtic are relying on Edouard a fair bit at the moment which is why Rodgers and the supporters will want to see Griffiths back on the pitch as soon as possible, especially ahead of the Aberdeen and Rangers games in late December.
These two games are going to be vital to Celtic’s season because the talk now is can the club complete the treble-treble.

Brendan Rodgers’ side are going for the remarkable feat of winning the Scottish Premiership, Scottish Cup and Scottish League Cup treble for a third year in succession.
It is an achievement they will fully believe is on the cards, given the quality in their ranks and winning mentality they have built up.
Having Griffiths available again will only help in that respect, with the 28-year-old scoring 103 goals in 197 Hoops appearances.