Chelsea led 1-0, 3-1 and 4-3 but we always found a way back into it with goals from Jonathan Woodgate, Dimitar Berbatov, Tom Huddlestone and Robbie Keane.
"It's very disappointing, we come with so many positives from this game but we didn't win, it's very disappointing when we lead 1-0, 3-1, then conceded goals from corners and a free-kick, and then a big mistake and Robbie Keane scored a fantastic goal," said the Chelsea boss.
"One of our strengths is we defend well at corners and free-kicks, but in the last two games Tottenham scored against us six goals, five from set pieces. I don't know how to explain this; it's more than unusual for us.
"We showed a great spirit and, of course, we will continue to fight."
Avram Grant said he took plenty of positives from Chelsea's performance - the main negative his side's defending from set-pieces