Spurs marked the opening of their new stadium with a 2-0 win.
But McArthur told cpfc.co.uk: “They're obviously a good side, and they've hurt us tonight – we caused them a couple of problems, but on the whole – we're very disappointed.
“We have got a really good defence, top players with a good 'keeper behind them. It was part of the gameplan to keep them quiet to start with, try to grow into the game. But [ultimately], we've not tested them enough."