United are looking to move back into the top half of the Clydesdale Bank Premier League and open up a six-point lead over the Dons.
But former Queen's Park player Douglas knows it will not be easy against the resurgent Dons.
He said: "Aberdeen have been doing really well. We have two teams who are have been going well playing each other so it should be a cracker.
"It would not too much of a surprise for both of us to finish in the top six but there is a lot of work to do before we can achieve that."
Source: PA
Source: PA