Edgar Davids presented Jermaine Jenas with an opening in the 62nd minute, with his effort - from a heavy pass following a 90 yard run - squirting wide, before in the next attack the home side opened the scoring when Craig Bellamy hit the post and Mark Gonzalez struck home the rebound.
Liverpool added a further two goals to create a scoreline which would have been imagined unlikely given the balance of the game in the first half.
"We missed a very good chance and they punished us," said the goalkeeper after the game. "For 60 minutes we were arguably the better team and didn't deserve to lose by a three-goal deficit.
"Maybe Liverpool played better than us in the second half, but such a margin did not reflect the game."
Robbo added that he does not believe the result will affect the morale of the squad going into the challenges ahead.
"I hope not and don't think so. I believe we will take the positives from the first hour when we played well. The killer blow was missing a chance then conceding.
"If we get a goal it will change for us, but we are hurt and disappointed at the moment."
Paul Robinson reflected that the outcome of Saturday's encounter with Liverpool hinged on a crucial second half minute, during which time there were clear chances at both ends.