Celtic must dust themselves down and get up and go again following the defeat at Aberdeen last Saturday if they are to maintain their title challenge.
The setback sees the Dons go to the top of the Scottish Premier League at the expense of the Hoops but the Parkhead side are looking to bounce back from the defeat.
Bhoys boss Ronny Deila was less than happy with the display from his men, especially his defenders, as Celtic went from a goal up to losing 2-1 to a side who only had ten men on the pitch.
The equaliser came from a penalty given away by Dedryk Boyata, whilst the winning goal came from a long free-kick which should also have been dealt with.
It was the winning goal which truly would have frustrated Deila, as the free-kick was one in a position which should not have led to a goal scoring chance.
Such are the standards expected of Celtic the pressure starts to grow on the manager if there is perceived to be a problem and Deila, who last season proved to be a good defensive coach, knows he needs to sort out that area of his team if they are not to fall further behind the unbeaten Dons.
Aberdeen currently sit at the top of the Scottish Premier League five-points clear of Celtic in second place having won their game in hand in midweek.
Celtic, who recorded a 2-2 draw in Amsterdam with Ajax in the Europa League on Thursday night, return to Parkhead on Sunday where they are 1.25 to pick up a win over Dundee, the draw is 5.50 and an unlikely away win is priced at 12.00.