Leicester went down 3-2 at home to Norwich, after going in at the break all square the visitor's then scored two quick goals leaving Sven-Goran Eriksson's team chasing the game. Eriksson, whose side are now seven points from the play-offs, said: "It was very bad, I think. The first 45 minutes were good. Both sides played well.
"We all thought at half-time that we could win the game and then it was 3-1 more or less after 15 minutes. We weren't even second to anything. We didn't win any challenge, second ball or anything.
"We let them have the ball and do what they wanted. I do no know why we started the second half with no energy at all. It was extremely disappointing. I have not seen this team like that before."
Eriksson said of the Foxes play-off chances: "I don't know, it depends totally on us - if we won't go on and have a good season as we were having until four games ago.
"We have to stand up in the last 10 games with honour for ourselves, for the club, for the fans, for everyone."
Norwich boss Paul Lambert felt it was the best display of the campaign.
Lambert said: "That's as good as we have been this season. We dominated from start to finish away from home and in front of a vibrant crowd. We thoroughly deserved to win."
And Lambert insisted Norwich had the character to maintain their promotion push.
He said: "We have surpassed what we thought we could do. The three-year plan was to survive in this league. Now we have as good chance as any - QPR, Cardiff, Leeds and Swansea - of going up."