Parker made eleven changes to the team that drew with Nottingham Forest on Saturday and lost 2-1 on the night.
“Fundamentally, it was a disappointing night really," said Parker.
“Firstly, disappointing result, because we came here wanting to win the game. I think it’s fair to say performance-wise, we were way short, certainly first half, really, really short. And in terms of where we want to be, in terms of what we were, and what we are, we just felt a little bit short of our standards tonight.
“Second half, there was an improvement, but, you know, you give a team a two nil head start in the first half, we give ourselves a big climb. We had some good chances in the second half, but I think on reflection of the game if we’re all being brutally honest, we probably didn’t deserve to win tonight. So yes, disappointed.”
He added, "We wanted a good cup run, this is a competition that supplies games and gives game, so I’m disappointed we’re out of that. But we need to learn from tonight, we need to go over it and work out where we were short. Not just short we were way short in some parts of that. Of course, we need to learn from that but focus now, after tomorrow, is the big game for us at the weekend.”