"I am really upset because I thought we deserved more," said Coleman to the club website after the game.
"We were disappointing in the first half because we didn't play our own football, but we looked much brighter in the second half and I honestly thought we were going to get something from the match.
"I feel for Danny Fox after he slipped in the build-up to their second goal. He has been outstanding for us this season and we just didn't have the rub of the green.
"I know I keep saying it but the next four matches really are Cup finals for us. We have to go into every game with the sole intention of winning because if we don't, we could be in real trouble. "It is in our own hands."