Spurs were beaten 1-0 by the Canaries after Robert Snodgrass scored the only goal of the game in the 47th minute which saw them remain fifth on the table, dropping six points behind fourth-placed Liverpool.
Sherwood felt his Tottenham outfit did not do enough to put pressure on Norwich when it was 0-0 and suggested his players missed a chance to really take it up to a team sitting just above the relegation zone.
"We didn't get started until the second half, which isn't good enough" he told Sky Sports.
"We started brilliantly at Newcastle (last week) and we got the rewards (with a 4-0 win) - today we took too long, we weren't brave enough on the ball, didn't take enough risk and weren't good enough in our one-v-one defending.
"There weren't a lot of positives in that first half but in the second half we had chances and threw caution to the wind.
"After half-time I had words and said 'we need to go out and be better in the second half' - after a minute they score.
"It gives them a leg up and gets the crowd with them and it was difficult. We had some clear cut chances to score and if you can't take them you don't win football matches."
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