Sir Alex Ferguson hit out at the Old Trafford crowd after his Manchester United side laboured to a 1-0 win over Birmingham City.
After taking the lead courtesy of a fabulous goal from Carlos Tevez, the hosts failed to make their dominance count and were left hanging on to their narrow lead at the end.
The Manchester United boss blamed poor finishing for failing to kill the game off but felt the sell-out crowd could have given his side better backing.
"The atmosphere was not very good," Ferguson told Sky Sports.
"It was like a funeral out there and we needed them (the crowd) to lift us a bit. We needed that today.
"It was the quietest I have heard here for some time and the atmosphere today
did not help us.
"There have been periods like that in the past. Some years ago, when we were dominant, the crowd came to be entertained.
"Sometimes we need them to get behind us. They can help produce the right
performance but we did not get that today."
The United boss was annoyed his side did not kill off the plucky visitors who came more into the game the longer it stayed at 1-0.
"We were very careless with our finishing; we need to be doing better," said Ferguson.
"The last 15 minutes was all Birmingham and we could only have blamed ourselves if we had conceded. We could have been embarrassed."
In spite of missing a host of chances, United did score a superb goal courtesy of Tevez who was substituted later with an injury which makes him doubtful for this weekend's FA Cup tie with Aston Villa.
"It was a fantastic piece of football for the goal," enthused the United boss.
"The vision of Ronaldo to put Tevez in the clear was excellent but after that we were so careless with our finishing and we could have paid the penalty for it."
Ferguson was also glad to see Park ji-Sung back in the side after being sidelined by injury for a long period. The Korean completed 75 minutes before making way for Owen Hargreaves.
"I thought Park and (Nemanja) Vidic were our best players today. As Park has been out for nine months I thought it was a very impressive performance from him."