The Sky Blues were blown away by a masterful first-half performance from their hosts, where Gareth Bale netted in between a Clint Dempsey brace.
And Robins admitted his men were always facing a tall order with such stellar names on display.
"We always knew it would be difficult but it got more difficult when we saw the team sheet," he said.
"When you come to places like this you always hope the team you play against has a bit of a dip and that they take a few liberties, but they didn't.
"Spurs were magnificent. Scott Parker led it and everyone followed suit.
"Whenever we got the ball, they were quicker than us and they got it back. It was a shame we didn't get a goal to take some heart from."