Claudio Ranieri was unhappy with his players after Leicester City's 2-1 defeat at Hull City.
Ranieri, whose Foxes made a habit of upsetting the odds en route to their 5000/1 title charge last season, was clear where the game was lost.
A Riyad Mahrez penalty just after half-time drew them level but they never fully settled.
While Ranieri refused to fault Leicester's work-rate he believes they did not display sufficient team work, an attribute that was crucial to their success.
"We made a big effort but it was individual effort, not like a team," said Ranieri.
"Our strength is when everyone is connected to each other.
"Against Manchester United (in the Community Shield) we played as a team, today it was big effort but not together. This is the key of the match.
"I can say thank you to my players, their effort was amazing, but they must understand the team is stronger than individual players."