The Championship side went ahead midway through the second half, but conceded three goals in the final 20 minutes as they exited the League Cup at the third-round stage.
After the game, Pearce told BBC Sport that the players showed the club is "going in the right direction".
He said: "We had a gameplan. We went in to defend deep and counter attack and I was very proud of the way we imparted that on the game.
"We showed this club is going in the right direction and it is a very healthy place to be at the moment.
"Some of these players needed first-team football and I'm not sure if I'd have fielded another side whether I'd have seen a better performance. A few players here showed me they are ready to start again on Saturday."
Tottenham have been rewarded with a home tie against Brighton & Hove Albion in the fourth round.