A lot of Celtic fans have been reacting on Twitter to the latest news that has emerged this afternoon.
So how exactly did Celtic fans react on Twitter?
It seems that Griffiths is already getting his preparations in ahead of pre-season in order to try and impress new Celtic boss Ange Postecoglou.
However, judging by the reaction of many Celtic fans on Twitter, it seems that many have lost patience with Griffiths as many have suggested it is a year too late, alluding to the fact he reported back to training overweight last summer.
It was a disappointing campaign for Celtic and Griffiths as he appeared just 26 times in all competitions for the Scottish powerhouses, scoring just seven times, as Celtic ended the season trophyless.
Celtic also lost their grip on the Scottish Premiership title last season after nine years. Their dominance was ended as Steven Gerrard’s Rangers went unbeaten over the course of the league campaign to secure their 55th top-flight title.
Therefore, perhaps there is little surprise over these reactions to the footage of Griffiths attempting to get in shape.