Aberdeen manager Mark McGhee:
"We set out to try and pass the ball and get in-between them and mix it up.
"To a large extent, it worked for us, we had a lot of possession and eventually we got a goal.
"Derek stayed in the team because he's worked ever so hard to come back in to the reckoning, and he thoroughly deserved to be in the team and got his reward for the effort in getting the winning goal.
"It takes a lot of energy to play the way we tried to play today, in the midfield particularly, but we still felt comfortable."
Kilmarnock manager Jimmy Calderwood:
"Our final ball let us down, but we were quite comfortable.
"We started the second-half sloppy, and I'm chuffed for wee Derek that he got it, but the difference between the two teams was Darren Mackie, his hold-up play was fantastic.
"I think we dominated at the end, and it was one-way traffic, but the damage was done early in the second-half."