Cardiff manager Neil Warnock admitted Tottenham were too good for his side during the first half of the 3-0 defeat on Tuesday.
Goals from Harry Kane, Christian Eriksen and Son Heung-min in the opening half hour were enough for Spurs to claim the victory and Warnock admitted his side had little chance of getting anything from the game after the disastrous start.
"When we start off like that we shoot ourselves in the foot," he said, as quoted by BBC Sport.
"All the planning goes out of the window. The goals were disappointing but they were too good for us in the first half.