Knutsen warned his players before the Tottenham match about making the same mistake as against Manchester United (when Alejandro Garnacho gave United the lead within the first minute) earlier in the tournament, but the Norwegian outsiders apparently hadn't learned their lesson as Brennan Johnson found the net with a strong header 38 seconds into the match in London.
"We put ourselves in an extremely difficult situation when we concede a goal after 40 seconds. That is completely unforgivable", said Knutsen at the press conference after the match.
"Actually, we had good control of the match in the first half, however, we struggled a bit with their deliveries for the back of our defence and in connection with the first goal, I just got to say that we can't act like that in the box", said Knutsen.
Although the two-goal defeat means that the tie is still alive before Tottenham visit the artificial turf at Aspmyra, Knutsen was very critical of his players' performance in London and said there are an awful lot of things to be learned before the return leg in a week's time.
"We depend on all players showing their best level. There were too many personal mistakes, we lost the ball too much, lose man-to-man duels, we just stood and watched the action.
"There is an incredible amount of things to be learned from this match that we have to take home with us. There is a difference between artificial grass and grass, and some of this applies to us in the coaching team," said Knutsen.
"It's just too simple and not good enough. There were many details where we weren't up to speed, I haven't seen them all, but we can only learn from that. We should be happy that we still have the opportunity (to turn the tie), when we go to Aspmyra in one week, because it could have been much worse.
"We get three key players back in Norway (Patrick Berg, Hakon Evjen and Andreas Helmersen), so we have more options to choose from which will make us more competitive than here", he said.
Tottenham will face Bodo/Glimt at the Aspmyra Stadium on May 8th in the return leg.