Petr Cech accepts Chelsea's well-oiled "machine" took just too long to recover in their bid to snatch the title away from Manchester United.
Carlo Ancelotti - who won the Double in his debut campaign - is facing growing speculation he will be replaced in the summer.
Chelsea had started the 2010/2011 campaign in blistering fashion, winning their first five Premier League games, conceding just once before defeat at Manchester City.
However, a poor run around the turn of the year with just 10 points from 11 matches saw them drop out of the top four. It was a deficit which despite their recent eight wins from nine before losing at Old Trafford proved too much to overcome.
Cech said: "In December and January, we dropped so many points, and gave advantage to the others, especially Manchester United.
"We had a great last two months and managed to come back, and it was a pity we could not win the game at Old Trafford.
"If you look at the season as a whole, they were more consistent, which is why they have the title."
Cech added on BBC Sport: "It is always difficult to find the reasons because you have to analyse it deeply.
"Sometimes in football, things happen and you can't do much about it - the machine was stuck and unfortunately it took us a bit longer than we wanted to make it run again."
Chelsea skipper John Terry has spoken publicly in defence of the under-fire Blues manager, who spent £75million on Fernando Torres and David Luiz in January, but could not find the magic touch for a second season.
"We had a great season last season, and an interesting one this season, but we have no trophies which is disappointing for everybody," he said.
"This is, though, a decision for the club to make and we will see what comes out."
Cech added: "It is difficult because when you are at a big club with a lot of expectations you want to constantly win things.
"Sometimes it is a hard job to do, but sometimes this is the way it is in football.
"As a player, you try your best to make things happen and the rest is up to the others."