Norwich manager Alex Neil said his players were "angry with themselves" after being held to a 2-2 draw at Fulham.
The Canaries were 2-0 up at half-time after Graham Dorrans converted two penalties - both conceded by Scott Malone.
But Fulham dominated the second period and drew level thanks to Stefan Johansen, who got the final touch on a Chris Martin shot.
And it was former Norwich striker Martin who equalised in the 66th minute to ensure the Canaries were knocked off top spot following Newcastle's win.
Neil was not too concerned about that as the season is less than a third of the way through, but he was not impressed with his players' performance in the second half.
"We lost concentration for 15 minutes and didn't defend well enough to absorb the pressure we were under," he said.
"It's really frustrating because Fulham's tactics didn't change - we knew what we were up against. But the players are angry with themselves because they know how much it means.
"It doesn't matter as long as you are in and about the top at Christmas. You don't want anybody getting away from you."
Malone must have been delighted that his two penalty-conceding challenges did not result in defeat. The first saw Jacob Murphy upended in the 16th minute and Cameron Jerome was bundled over five minutes before the break.
Fulham have not had much luck with spot-kicks this term - they missed two themselves against QPR earlier in the month and lost 2-1.
"What did I say at half-time? Nothing special, be professional and work together. Look to score one goal and after we can score more," said head coach Slavisa Jokanovic.
"We made big mistakes but after we went 2-0 down it was a better performance. We were more solid and started to play good football.
"Today we conceded two penalties, against QPR we missed two penalties, in two other games we finished the game with 10 players - we make so many big mistakes.
"I am frustrated about many things but if the referee says it is a penalty, it is a penalty."
Jokanovic hailed Martin, who is on loan for the season from Derby.
"We brought in Chris Martin to do this job," he said. "His physical preparation is the highest level and he can show us the Chris Martin that we know.
"I know him from many years in this competition, he is a player who can guarantee you 15 or 20 goals."