The Celtic fans wake up this morning knowing that today could be a really pivotal day of the season as the first of the post-Scottish Premiership split fixtures take place. Brendan Rodgers takes his side to Dens Park to face a Dundee side who have just recently shown against Rangers that they will be no pushovers. Rangers also travel to St Mirren to face a Stephen Robinson side who is looking to qualify for Europe this season. So with plenty to play for and a lot at stake, the Celtic manager must look to get his team selection right today to ensure that taking three points from Dundee is as si…