They are facing a third straight defeat for only the second time under the Catalan.
But Guardiola says his players are not suffering a crisis of confidence.
"They've always had the courage to play," he said. "We do not spend 30 seconds wasting time or passing to the keeper. We always play and we will do that until the last day I am here."
"I would like to find an explanation," added Guardiola. "Against Spurs we had energy and power. I know they want to score.
"But we cannot win when we miss and they arrive once and score.
"That's a problem in terms of things not going well. I don't know why we are missing chances."