Preston manager Alex Neil told Sky Sports: "I always thought it would be a 1-0 game, we didn't want to dominate possession.
"If you play poorly and you lose it's easier to take but today we found ourselves on the wrong end of the scoreline.
"I don't think we created enough opportunities but I didn't think Cardiff did either, it was a game that lacked quality in the final third.
"That's three 1-0 losses we've had now, we've not been outplayed but they have taken opportunities when we have not.
"We need to come up with alternatives to help us break the deadlock."
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