Liverpool captain Steven Gerrard admits victory at QPR left him in "shock".
Eduardo Vargas' two late goals had the hosts edging towards a deserved and creditable draw, only for Caulker to put through his own net in the fourth minute of added time.
"We're still in shock to be honest. We're very lucky today," Gerrard told Sky Sports 1.
"We would have had no complaints if we came away with nothing, we would have no complaints if we came away with a point. I think we're very lucky to come away with three points.
"Our performance needs to be better. I think the only credit we can give ourselves is that we never give up and keep going to the end.
"We got rewarded in the end for hanging in and staying in the game but all around it needs improving."
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