Ferguson's youthful Manchester United outfit cruised into the Carling Cup semi-finals for the fifth time in eight years thanks to Darron Gibson's brilliant first-half brace.
"We have to look upon this as a really good win for us," said the United boss.
"Tottenham have improved tremendously and look as if they are going to push for the top four."
He added: "They have a strong squad and the lads who came in for them tonight did very well. We have played a good team so I have to be pleased."