"I am disappointed that we have now got to play an extra game. If you don't score a second goal, it is always going to be difficult," the Spurs boss said after the 1-1 draw.
"They played a 4-5-1 formation and we tried to open them up. But you need good service from Kelly and Atouba and it seemed to be getting worse and worse. We lacked movement on the flanks.
"Our crossing was below par and maybe we are happy to go up there and play another 90 minutes because their little guy Kris Commons was so dangerous.
"I didn't hear any booing at the end because I was too focused on the end of the game to hear the fans frustrations.
"We haven't lost any of our momentum and everyone is still satisfied with what we are achieving at the moment.
"There was miscommunication for the Forest goal and confusion at the back. We tried to play offside on a floating ball over the top of the defence.
"Robbo had to come for the ball and normally the defender would kick the ball into the stands in that situation.
"I thought our first goal might have been the same as the one we scored against Manchester United because I couldn't see if it had crossed the line.
"We all thought it was going to be an easier game after that, but it wasn't to be. You only have to look at Leicester and Sheffield United to see what can happen in the cup, but we should have got the second goal."