With Crewe currently 0-3 late in the first half of their FA Cup 2nd round tie with Bristol Rovers it’s unlikely that the Dons will get to play Mansfield on a Saturday.
Had Crewe been victorious their League Two game at Mansfield would have been postponed on Jan 6th when they’d have faced Norwich City instead.
It means unless there’s a massive change if fortunes in the second half the Dons will have a free Saturday now on Jan 6th.